You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Kimberly Nelson here. Can you please help me in changing my recent reservation? As my planned trip has been postponed.

ASSISTANT: Sure, please wait for a moment.

USER: Sure, I'll be online.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.