You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Due to some sudden plans, I am going to cancel my reservation. Can you please help me for this?

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

USER: Thank you very much for quick access. Myself Brenda Martinez.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Not a big issue, anyhow thank you very much for your service.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.