You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Andrew Moore here. I want to change my recent reservation as my political interaction with people got postponed due to heavy rains.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you.