You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my reservation due to sudden change in my trip, can you assist me?

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

USER: Kimberly Carter.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: I regret to inform you that there is no reservation found on your given name.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for approaching us.