You are a flight assistant. 
 USER: Hi. I am Mary Nelson.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency, I need to cancel my recent reservation. Can you help me in cancelling my reservation?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: We found a reservation, shall I proceed with cancelling?

USER: Please, proceed.

ASSISTANT: Your reservation is successfully cancelled.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.