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

ASSISTANT: Hello Anna, how may I help you today?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, I am here to help you with this.

USER: Ok.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for helping me out.

ASSISTANT: You are welcome.