You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my reservation due to heavy Sandstorms at my destination place, will you help me to cancel?

ASSISTANT: Sure, I am here to help you. May I know your name please?

USER: I am Debra Hill from Oakland.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform no reservation found on your name.

USER: No issues, thanks for your prompt response.

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