You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Richard Roberts here. 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.

USER: Ok.

ASSISTANT: Roberts, there is no reservation found for you to cancel.

USER: It's ok. Thank you for the information.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.