You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicholas Robinson here.

ASSISTANT: How can I aid you today?

USER: I want to attend a seminar in New York. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I can help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: My travelling dates are from 08/15 to 08/17.

ASSISTANT: May I know your airport code names for further process?

USER: My airport codes are from BOS to LGA.

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

USER: Ok, I will wait.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us, have a nice day Nicholas Robinson.