You are a flight assistant. 
 USER: Hello. I am Gregory Garcia.

ASSISTANT: Hello, how can I help you?

USER: I have to attend a Music Concert at Las Vegas, could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: I would like to take off on 04/13 and return on 04/15.

ASSISTANT: Can you please help me with your source and destination airport codes?

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

ASSISTANT: AA airlines is having a flight with travel charge of 100, shall I proceed booking?

USER: Please proceed with the booking if the connection is 1.

ASSISTANT: Your ticket has been booked with flight-1009 which is having 1 halt only, have a safe flight.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for choosing us.