You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Anna Carter, do you have any flight from DTW to PHL?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are 07/19 and 07/21.

ASSISTANT: Sorry Anna Carter, there is no flight for you on your route.

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

ASSISTANT: Thanks for reaching us.