You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I best serve you?

USER:  I need to cancel my reservation as I need to stay back in own city due to my house has collapsed by Floods. Can you help me to cancel my reservation?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Sure, I am George Thomas.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name to cancel it.

USER: Ok, no issues. Thanks for your quick response.

ASSISTANT: Thanks for choosing us.