You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Dennis Young. Can you cancel my existing reservation?

ASSISTANT: Sure, I will help you with that, please hold on for a moment to check your reservation status.

USER: Ok, I will wait.

ASSISTANT: Dennis, I did not find any active reservation with your name in my database.

USER: That's ok. Thank you for the information.

ASSISTANT: Thank you for reaching us.