You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Justin Smith.

ASSISTANT: Smith, how can I help you today?

USER: Please help me for cancelling my recent reservation, because I have to stay in my hometown due to some reasons?

ASSISTANT: Ok, please wait. I will check your previous reservation.

USER: Ok, I will wait for your reply but get back with my reservation status.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for your quick services.

ASSISTANT: You are welcome.