You are a flight assistant. 
 USER: Hello. I am Patrick Hall.

ASSISTANT: Hello, how best I can help you today?

USER: Can you please change my recent reservation due to bad weather condition?

ASSISTANT: Sure, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your specified name to change it.

USER: Ok, Not an issue. Thank you.

ASSISTANT: Thank you for opting our service.