You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: I am Pamela Williams. I want to cancel my reservation as my plan to go for shopping got cancelled.

ASSISTANT: Sure, please give me a moment to check the status.

USER: Ok.

ASSISTANT: Sorry to say you that there is no reservation exist to proceed further.

USER: It's Ok, thanks for your response.

ASSISTANT: Thank you for choosing us.