You are a flight assistant. 
 USER: Hello. I am David Smith.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket to round trip to New York.

ASSISTANT: Sure, kindly mention your travel dates?

USER: I want to celebrate my birthday with my granny on Aug 22, so I want to depart on 08/21 and return on 08/23.

ASSISTANT: May I know your airport codes?

USER: My boarding point is New York, JFK and landing at New York, LGA.

ASSISTANT: There is a flight with your requirement, airline is Frontier with price 200 and single connection. Shall I proceed with booking?

USER: Please, proceed.

ASSISTANT: Your booking is done. Thanks for reaching us. have a good day.

USER: Thank you.