You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your good name?

USER: I am Mary Parker.

ASSISTANT: We found a reservation with your name.

USER: Ok, please cancel my ticket.

ASSISTANT: Your flight ticket has been cancelled.

USER: Thanks for your kind service.

ASSISTANT: Thank you.