You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Betty Campbell here. Do you have any flight from DTW to PHX?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your travel dates to proceed further?

USER: My travel dates are 10/30 and 11/01.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your route.

USER: That's fine, thanks for your information.

ASSISTANT: Welcome.