You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can I have your name please to check your reservation status?

USER: Sure, my name is Jeffrey Lopez.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry Jeffrey Lopez, no reservation has found under your name to cancel.

USER: That's fine. Anyways, thank you for your service.

ASSISTANT: Thank you for choosing us, have a good day.