You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: My name is Jonathan Allen, I want to change my existing reservation due to heavy rainfall.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thanks for connecting with us.