You are a flight assistant. 
 USER: Hi, I am Cynthia Smith.

ASSISTANT: Hello, how may I assist you?

USER: I want to go for a round trip from New York, NY - LGA. Can you please book a ticket with a price limit of 200?

ASSISTANT: Sure, may I know your travel dates?

USER: I would like to depart on 12/06 and return on 12/08.

ASSISTANT: We found a flight on your details with airline UA, flight number: 1015. Shall I book this ticket?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for helping me.

ASSISTANT: Thank you.