You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: My name is Robert Green and I want to cancel my reservation. Can you please help me?

ASSISTANT: Ok, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there is no flight on your name in our database.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.