You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I would like to change my reservation due to some health issues, can you please help me out with that?

ASSISTANT: Sure, I am here to help you. May I know your name to check your reservation status?

USER: Thank you. Myself Christopher Parker.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure.

ASSISTANT: We have found an active reservation on your name. Please, share me your airport codes.

USER: Sure, my airport codes are ATL and MSP.

ASSISTANT: May I know your travelling dates, please?

USER: Sure, my travel dates are from Jan 18 to Jan 20.

ASSISTANT: Do you have any preferences regarding your journey?

USER: I would prefer connecting flight.

ASSISTANT: We have found a direct flight in economy class, shall I reserve it?

USER: Ok, please reserve it.

ASSISTANT: Your ticket has been booked with flight 1005.

USER: Thank you for booking.

ASSISTANT: My pleasure.