You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Rachel Evans and I want to book a flight ticket to attend my grandfather retirement function.

ASSISTANT: OK, can you please provide me your travel details?

USER: My boarding is from Los angeles,CA-LAX on 11/04 to Dallas&Fort Worth on 11/06.

ASSISTANT: Can you send your source code?

USER: My airport code is TX-DFW.

ASSISTANT: OK, please wait a moment. Sorry to inform no flight found with your requirement.

USER: OK.

ASSISTANT: Thanks for reaching us, have a good day.

USER: NO issue, thank you.