You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I render you at this moment?

USER: Can you cancel my reservation, which is done earlier? As I need to stay back on my home due to the sudden rainfall.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Sure, Patrick Edwards is my name.

ASSISTANT: Sorry Patrick Edwards, no reservation found on your name in our reservation list.

USER: That's ok, thanks for your response.

ASSISTANT: Thank you for approaching us, have a nice day.