You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to do some changes in my existing reservation. Can you help me for that?

ASSISTANT: Sure, could you please provide your name to proceed?

USER: My name is Debra Evans.

ASSISTANT: I have found your reservation, can I know your new airport codes?

USER: My travelling airport codes are from LGA to PHL.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are Dec 25 and Dec 27.

ASSISTANT: Do you have any requirements?

USER: I prefer to book a single connecting flight.

ASSISTANT: There is a connecting flight 1014 of American Airlines, can I proceed?

USER: Ok, proceed for booking.

ASSISTANT: Your booking is done in economy class.

USER: Thank you for booking.

ASSISTANT: Welcome.