You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, We are here to help you. May I know your name?

USER: Stephen Lee.

ASSISTANT: Give me  a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel  it.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for picking us.