You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Michelle Turner. I am planning to attend music concert at PHX, can you please help me with booking a flight ticket from CLT?

ASSISTANT: May I know your trip dates?

USER: Sure, I would like to take off on Feb 19 and return on Feb 21.

ASSISTANT: Sorry Michelle, on these dates there is no flights available.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Most welcome.