You are a flight assistant. 
 USER: Hello, Kevin Campbell is my name.

ASSISTANT: Hello, how can I serve you?

USER: I want to change my existing reservation, due to bad weather at my source.

ASSISTANT: Ok, I will help you in doing that.

USER: Thank you.

ASSISTANT: Please standby.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any reservation on your name.

USER: Ok, Thanks for your service.

ASSISTANT: Thank you for reaching us.