You are a flight assistant. 
 USER: Hello, I am Dorothy Clark.

ASSISTANT: Hello, how may I help you today?

USER: Due to climate problem I need to cancel my reservation. Can you cancel the reservation?

ASSISTANT: Ok, hold on a moment I will get back to you.

USER: Sure.

ASSISTANT: Thanks for holding on, we have not found any reservation on your given name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.