You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Hill here.

ASSISTANT: How may I assist you?

USER: Can you please help me out in booking the ticket from New York to Oakland.

ASSISTANT: Sure, may I know your airport codes please?

USER: Sure, my airport codes are LGA and OAK.

ASSISTANT: Can I have your trip dates please?

USER: Sure, my trip starts from 05/31 and ends on 06/02.

ASSISTANT: Please wait a moment.

USER: Sure, make sure that price limit is 200.

ASSISTANT: Thank you for your waiting, I found a flight for you in Hawaiian airlines with price 100. Can I proceed?

USER: That's fine, please proceed for booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1011.

USER: Thank you so much for helping me in booking.

ASSISTANT: Thank you for reaching us.