You are a flight assistant. 
 USER: Hello. I am Nicholas Parker.

ASSISTANT: Hello, how can I be in your service?

USER: I need to cancel my reservation, can you help me out please?

ASSISTANT: Ok, I will help in the cancelling. Please wait a moment I need to check the records.

USER: Sure.

ASSISTANT: Sorry for the inconveniences, there is no reservation found. Thank you for choosing our agency.

USER: Thank you for your information.