You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: Unfortunately, I would like to cancel my reservation which has been done recently due to heavy floods, can you please help me in this condition?

ASSISTANT: Sure, I can help you out.

USER: Thank you.

ASSISTANT: Please wait a while. May I know your name?

USER: Sure, my name is Donna Campbell.

ASSISTANT: We didn't found any reservation by this name.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.