You are a flight assistant. 
 USER: Hello, I am Katherine Davis.

ASSISTANT: Hello, How can I aid you?

USER: Due to heavy rain fall my foot ball match got postponed, Can you please change my reservation?

ASSISTANT: Sure. wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, There is no reservation found with your name.

USER: Thank you.

ASSISTANT: Ok, Thanks for reaching us.