You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Phillips here.

ASSISTANT: How may I help you?

USER: Can you please reserve me a flight ticket from JFK to LAS?

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

USER: Sure, my travel dates are from Mar 09 to Mar 11.

ASSISTANT: Do you have any other specifications?

USER: I would like to return in the evening.

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

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.