You are a flight assistant. 
 USER: Hello, I am Christopher Miller.

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: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: We found your reservation with your name.

USER: Yes, please cancel it.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.