You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How shall I help you?

USER: Due to some personal work, I want to change my existing reservation.

ASSISTANT: May I know your name.

USER: Sure, I am Richard Garcia.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Reservation is found. Please help me with your travelling codes.

USER: Sure, my source is Orlando, FL - MCO. My destination airport is New York, NY - JFK.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are 02/21 and 02/23.

ASSISTANT: Connecting flight 1011 can be booked with airline UA, for price 100. Shall I book flight ticket?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is booked.

USER: Thanks for booking.

ASSISTANT: Have a great day!.