You are a flight assistant. 
 USER: Hello, David Hall here.

ASSISTANT: Hello, how may I guide you?

USER: I would like to cancel my reservation. Can you help me?

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Ok, take your time.

ASSISTANT: David, no reservation has been found on your name in our records.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for reaching us.