You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Larry Thompson here.

ASSISTANT: How may I assist you today?

USER: I want to travel from NV-LAS on 01/09 for attending a Seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I can help you in booking flight ticket.

USER: Ok.

ASSISTANT: May I know your destination airport code name?

USER: My destination airport code is New York, NY-EWR.

ASSISTANT: Do you need any help from us for booking return flight ticket?

USER: Yes, please book my return journey also.

ASSISTANT: May I know your return date?

USER:  My return date is 01/11.

ASSISTANT: Ok, please wait a moment, I will check flight availability.

USER: Ok.

ASSISTANT: Sorry for the inconvenience no flights available as per your requested dates.

USER: So sad for that. Anyway, thank you for the information.

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