You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: I would like to change my existing reservation, can you help me in that?

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

USER: Sure, myself George Moore.

ASSISTANT: Please wait for a moment, while I search for your reservation.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, I found your reservation in our system data. Please share me your airport codes?

USER: My preferred airport codes are MCO and JFK.

ASSISTANT: Please share me when you planned to travel?

USER: My planned travel dates are May 17 and May 19.

ASSISTANT: Do you want a connecting flight?

USER: Please look for a connecting flight.

ASSISTANT: Please mention your class preference?

USER: I don't have any other specifications.

ASSISTANT: Thank you for the details, sorry there is no flight found on your given journey data.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for visiting us, we hope see you again.