You are a flight assistant. 
 USER: Hello, I am Helen Clark.

ASSISTANT: Hello, how can I aid you for the day?

USER: Due to an emergency meeting, I want to cancel my reservation. Can you help me with it?

ASSISTANT: We found reservation with your name, shall I proceed with the cancel?

USER: Yes, please cancel it.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.