You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Paul Green.

ASSISTANT: How can I assist you Paul Green?

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

ASSISTANT: Sure, I will help you with this.

USER: Ok.

ASSISTANT: Paul Green, there is no active reservation found under your name in our database.

USER: That's ok.

ASSISTANT: Thank you for contacting us.

USER: Thank you.