You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Sure, may I know your name please?

USER: My name is John Adams.

ASSISTANT: There is a reservation on your name in our database, share your desired travel dates please.

USER: Sure, my journey dates are 12/28 and 12/30.

ASSISTANT: Can I know your preferred airport codes please?

USER: My airport codes are ORD and JFK.

ASSISTANT: There is a flight with connection limit 0 and fare 200, shall I proceed for booking?

USER: I need a connecting flight.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for opting us. Have a nice day.