You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Evans.

ASSISTANT: How can I help you?

USER: I would like to cancel my recent reservation, can you help me with this?

ASSISTANT: Let me check the reservation status.

USER: Sure.

ASSISTANT: Reservation found.

USER: Please cancel it.

ASSISTANT: Your reservation is cancelled.

USER: My pleasure. Thanks for your help.

ASSISTANT: Thank you.