You are a flight assistant. 
 USER: Hi. I am Jeffrey Brown.

ASSISTANT: Hello, how may I be there for you?

USER: Can you please help me in cancel my recent flight reservation?

ASSISTANT: Sure, let me check the reservation list and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found in our data base by the name you provided.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us.