TSQL find number of correspondences, Sql Server

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IF OBJECT_ID('dbo.tblMyTempTable', 'U') IS NOT NULL 
BEGIN
   DROP TABLE dbo.tblMyTempTable
END

CREATE TABLE [dbo].[tblMyTempTable](
[SenderName] [varchar](20) NULL,
[ReceiverName] [varchar](10) NULL,
[NumberOfTime] [int] NULL
) ON [PRIMARY]
GO

INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'David', N'John', 1)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'Mark', N'Anthony', 1)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'Ajay', N'Vijay', 1)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'John', N'David', 2)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'Anthony', N'Mark', 3)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'David', N'John', 5)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'David', N'John', 3)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'John', N'David', 2)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'David', N'Mark', 2)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'John', N'Anthony', 5)
INSERT [dbo].[tblMyTempTable] ([SenderName], [ReceiverName], [NumberOfTime]) VALUES (N'Anthony', N'John', 5)

;WITH CTE AS (
   SELECT IIF(SenderName < ReceiverName, SenderName, ReceiverName) AS first_name,
          IIF(SenderName >= ReceiverName, SenderName, ReceiverName) AS second_name,
          NumberOfTime
   FROM tblMyTempTable 
)
SELECT first_name, second_name, SUM(NumberOfTime) AS total_times
FROM CTE
GROUP BY first_name, second_name

DROP TABLE dbo.tblMyTempTable

View schema
Execution time: 0,03 sec, rows selected: 5, rows affected: 11, absolute service time: 0,19 sec