You are a flight assistant. 
 USER: Hello, I am Karen Adams.

ASSISTANT: Hello, how can I assist you?

USER: Due to the bad weather, My trip has been postponed. Can you please help me out in changing my recent reservation?

ASSISTANT: Sure, please wait for few minutes, let me check and revert you.

USER: OK.

ASSISTANT: Thanks for waiting, we are sorry to inform you that there is no reservation with your name.

USER: OK, no problem.

ASSISTANT: Thank you, for reaching us.

USER: Thanks for the information.