You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I need a flight ticket To go to DCA from LGA. Will you please let me know availability of flight tickets?

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure. I want to start my journey on 12/15 and return date is 12/17.

ASSISTANT: May I know your good name please?

USER: My name is James Lee.

ASSISTANT: Do you have any specifications?

USER: Price limit should not cross 5000.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We found a flight with UA airlines, flight number is 1015 with one connection and price is 100. Shall I proceed?

USER: Sure,you can proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for providing your service.

ASSISTANT: Thanks for choosing us.

USER: Thank you.