You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Jonathan Taylor, I want to book a flight from Boston, MA-BOS to visit Las Vegas for short vacation. Can you book a flight with in fare of 500?

ASSISTANT: Sure, may I know your destination airport code?

USER: My destination airport code is  NV-LAS.

ASSISTANT: On which dates do you prefer to reserve this ticket?

USER: I will fly on 01/28 and return on 01/30.

ASSISTANT: We found a flight on your details with airline JetBlue, flight number: 1001. Shall I book this ticket?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me.

ASSISTANT: Thank you so much.