You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to cancel my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, may I know your name?

USER: Ok, my name is Kevin Clark.

ASSISTANT: Found your active reservation and successfully cancelled.

USER: Thank you for your help in cancelling my existing reservation.

ASSISTANT: Thank you for reaching our service.

USER: Thank you for your service.