You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you at this moment?

USER: I want to cancel my reservation due to heavy Sandstorms at my destination place, so please help me.

ASSISTANT: Sure, I am here to help you out with that.

USER: Thank you.

ASSISTANT: On which name your previous flight ticket has been reserved?

USER: Sure, I am Donna Garcia.

ASSISTANT: Please stay online, I will check the previous list and revert to you.

USER: Sure.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: Not a problem, thank you.

ASSISTANT: Thanks for approaching us, wish you a great day.