You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Jeffrey Hall. I want to change my recent reservation, can you please help me with it?

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Thank you.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us, have a good day.