You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I need to cancel my recent reservation. Please help me in that.

ASSISTANT: Ok, may I know your name to check with your previous booking status?

USER: David Green.

ASSISTANT: Ok, please allow me to check with your booking.

USER: Sure.

ASSISTANT: Thank you for waiting. David Green, there is no active reservation found under your name.

USER: Thank you for your information.

ASSISTANT: Thank you for approaching us. Have a nice day.