You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dennis Mitchell.

ASSISTANT: How may I assist you today?

USER: I want to cancel my reservation, can you help me with that?

ASSISTANT: Sure, please wait a moment, let me check with your details.

USER: Ok.

ASSISTANT: Found your active reservation on your name, shall I cancel the reservation?

USER: Please go with the cancellation.

ASSISTANT: Your ticket has been successfully cancelled.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching our service.