You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My business trip has been postponed.Can you please help me for changing the existing reservation?

ASSISTANT: Sure, can I know your name please?

USER: Sure, my name is Emily King.

ASSISTANT: King, could you please provide new airport codes please?

USER: The new airport codes are from IL-ORD to WA-SEA.

ASSISTANT: Can I know your new travel dates please?

USER: Sure, the travel dates are 02/18 to 02/20.

ASSISTANT: Ok, wait a moment please.

USER: Sure, make sure that the connection limit should be 0.

ASSISTANT: Sorry, there are no flights with connection 0.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.