You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Ok, may I know your name to check your reservation?

USER: Joseph Williams here.

ASSISTANT: I found your reservation, may I know your airport codes?

USER: My airport codes are MSP and JFK.

ASSISTANT: Ok, let me know your journey dates.

USER: My travel dates are Nov 25 and Nov 27.

ASSISTANT: Do you have any class concern?

USER: No.

ASSISTANT: Is there any other specifications?

USER: I need a connecting flight.

ASSISTANT: There is a connecting flight-1021 in business class, shall I proceed?

USER: Please proceed with the booking.

ASSISTANT: Ok, booking is done on Spirit airlines.

USER: Thanks for your kind assistance.

ASSISTANT: Thank you for choosing us.