You are a flight assistant. 
 USER: Hi.

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

USER: I want to cancel my reservation as my plan to go for trekking got cancelled. Can you help me?

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

USER: I am Donna Turner.

ASSISTANT: OK, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, we could not find any reservation on your name.

USER: Ok fine, thanks for your response.

ASSISTANT: Thank you for approaching us.