You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you today?

USER: I am Kenneth Jackson, I want to change my existing reservation due to heavy rainfall.

ASSISTANT: Sure, please wait. I will let you know the current status.

USER: Ok.

ASSISTANT: Thanks for being patience. Sorry Kenneth Jackson, there is no active reservation on your name.

USER: Not an issue, thank you.

ASSISTANT: Thanks for contacting us.