You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Edward Nelson. I have to attend a Live Concert at Las Vegas, could you please help me with booking a flight ticket?

ASSISTANT: May I know your desired travel dates please?

USER: I would like to take off on 06/26 and return on 06/28.

ASSISTANT: Can I know your preferred airport codes please?

USER: My source airport code is DCA and destination airport code is LAS.

ASSISTANT: Wait a while.

USER: Sure, take your time.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Please confirm the booking.

ASSISTANT: Your ticket is booked, flight number 1013 with American airlines.

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

ASSISTANT: Thank you for choosing us.