You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Betty Collins. I need to cancel my recent reservation, Can you please help me that?

ASSISTANT: Sure, I am glad to help you. Please wait a moment I will check your reservation details and get back to you.

USER: Sure.

ASSISTANT: Sorry Betty, I did not find any details regarding your reservation in my website.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us. Have a pleasant day!.

USER: Thanks for your information.