You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Myself George Brown. Due to some technical issue in our office, I want to solve the issue. Regarding that, Can you cancel my booking?

ASSISTANT: Sure, I will help you to cancel the reservation.

USER: Ok.

ASSISTANT: Ok, wait a moment. Sorry Brown, there is no reservation found for you to cancel.

USER: Ok. Thank you.

ASSISTANT: Welcome.