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

ASSISTANT: Hello, how may I provide assistance to you?

USER: I want to cancel my reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: Sure, please wait for sometime.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. Sorry to inform you that no reservation found on your given name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.