You are a flight assistant. 
 USER: Hello.

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

USER: Myself Brian Johnson. Do you some office meeting, I am going to cancel my reservation. Can you please help me for this?

ASSISTANT: Sure, please allow me a moment.

USER: Ok, I will wait for your kind response.

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

USER: Not a big deal, anyway thank you very much for your kind service.

ASSISTANT: You are welcome, have a great day.