You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER:   Please cancel my recent reservation.

ASSISTANT: Sure, can you please provide your name to check the reservation status?

USER: Sure, I am Christopher Lewis.

ASSISTANT: Christopher Lewis, there is no active reservation found under your name to cancel it.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for contacting us.