You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I assist you?

USER: I am Betty Thomas. I would like to attend Global Business Awards event at Dallas & Fort Worth, DFW. Can you please make a reservation on 09/15 and 09/17?

ASSISTANT: Sure, May I know the source code?

USER: My source point is Philadelphia, PHL.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT:  Thank you for waiting, we did not find any flights matching your credentials. Thank you for reaching us.

USER: Ok, no problem. Thank you.