You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Martinez.

ASSISTANT: How may I help you?

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

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found basis on your details.

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

ASSISTANT: Most welcome.