You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Myself Joshua Lewis. I want to change my existing reservation, can you help me?

ASSISTANT: Sure, I am gleeful to help out in modifying your reservation. Please allow me a moment to check the reservation on your name in our database.

USER: Thank you for your quick response.

ASSISTANT: Joshua Lewis, there is no active reservation on your name in our reservation list.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.