You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Katherine Davis, I want to change my reservation as my meeting with client is postponed.

ASSISTANT: Sure, we are glad to serve you.

USER: Can you help me with that?

ASSISTANT: Sure,pllease hold a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no reservation found with your name.

USER: Thank you for the information.

ASSISTANT: Thank you for opting us.