You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy Brown.

ASSISTANT: How can I help you Dorothy Brown?

USER: Owing to an emergency, I had to cancel my existing reservation. Can you please help me with this?

ASSISTANT: Sure, please wait a moment, I will inform you.

USER: Ok.

ASSISTANT: Your reservation cancelled successfully.

USER: Thank you.

ASSISTANT: Thank you for approaching us.