You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Nancy Campbell here. I need to cancel my reservation as I need to stay back in own city due to my house has collapsed by Floods.

ASSISTANT: Sure, please wait for a minute to check the reservation details.

USER: Ok.

ASSISTANT: Thanks for your waiting. Sorry to tell you that, there is no active reservation found with your name in our database to cancel it.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for choosing us, have a great day.