You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nancy Lopez here.

ASSISTANT: How can I help you now?

USER: I want to travel from IAH to PHL for a business meeting, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT:  Could you please mention your travel dates for booking flight ticket?

USER: I am planning to move on 03/31 and please book my return ticket on 04/02.

ASSISTANT: Please hold on a moment, I will check flight in this route.

USER: Sure, take your time.

ASSISTANT: Sorry no flights available in this route as per your requested dates.

USER: Oh! So sad to hear. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.