You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Richard Brown. I have to attend my friend's wedding at Los Vegas, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with this. Can you please provide your nearest airport codes of travelling?

USER: My nearest source airport code is JFK and destination airport code is LAS.

ASSISTANT: May I know your preferable journey dates to proceed further?

USER: I would like to take off on 02/13 and return on 02/15.

ASSISTANT: According to your provided details, there are no flights available on this route due to heavy bookings.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for contacting us.

USER: Anyways, thank you for the information.

ASSISTANT: Welcome.