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

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to book a flight ticket from LGA - ORD?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 12/03 to 12/05.

ASSISTANT: Can I know your price limit?

USER: My price limit is 5000.

ASSISTANT: We found a flight on UA airline, flight number as 1016 with the fare of 200. Can I book your ticket?

USER: Please proceed to book.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.