You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am Mark Moore. I would like to cancel my reservation as I am leaving for technical meet, can you please help me out?

ASSISTANT: Sure, please allow me a moment.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation with your name in our portal to cancel further.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome, have a great day.