You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

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

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sure, I would like to take off on Mar 15 and return on Mar 17.

ASSISTANT: Do you have any other specifications?

USER: Yes, I would like to depart during afternoon time.

ASSISTANT: Ok. Sorry for this inconvenience, I could not find any flight with your requirements.

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

ASSISTANT: Thank you for reaching us.

USER: You are welcome.