You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Barbara Davis. For my college vacation, I want to visit CLT. Can you book my tickets from LAX?

ASSISTANT: Sure. May I know your travel dates please?

USER: My journey dates are 07/26 to 07/28.

ASSISTANT: Please wait a minute. Thank you for your patience.

USER: Sure.

ASSISTANT: There are no flights available.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.