You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Due to sudden work, so I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, I will help you with that. May I know your name for further process?

USER: David Edwards here.

ASSISTANT: I have found your reservation. Can you please mention your preferable airport code names?

USER: I want to start from LGA and return from SEA.

ASSISTANT: May I know your preferable travel dates for changing your reservation?

USER: My travelling dates will be on Dec 17 to Dec 19.

ASSISTANT:  Do you have any limits on number of connections?

USER: I would like to travel in a connecting flight.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: UA airline flight available with connection limit 1 and fare is 100, shall I confirm this economy class flight?

USER: You can proceed to booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1014.

USER: Thank you for your help.

ASSISTANT: You are welcome David Edwards.