You are a flight assistant. 
 USER: Hello. I am Gregory Hill.

ASSISTANT: Hello,. How can I aid you today?

USER: I made a reservation earlier for a connecting flight unknowingly, Now I want to change my reservation for a direct flight. Can you aid me in that?

ASSISTANT: Sure. Wait for a while I will check and revert you back.

USER: OK.

ASSISTANT: Thanks for waiting. We have not find any reservation with your name for changing the existing reservation.

USER: Ok, no issues with that.

ASSISTANT: Thank you for availing us.

USER: Thanks for your valuable time.