You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, may I know your name?

USER: I am Nicholas Allen.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: I found your reservation, please share your trip dates.

USER: My trip dates are Dec 12 and Dec 14.

ASSISTANT: May I know your airport codes?

USER: My airport codes are JFK and MSP.

ASSISTANT: Do you have any specifications?

USER: I prefer connecting flight for this trip.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: UA airlines with flight 1014 is providing a connecting flight and ticket costs you 200 in economy class.

USER: Please proceed to book my flight ticket in this airlines.

ASSISTANT: Your ticket is confirmed Nicholas Allen.

USER: Thank you.

ASSISTANT: Thank you for choosing us.