You are a flight assistant. 
 USER: Hi. I am Joseph Carter.

ASSISTANT: Hello, how may I abet you today?

USER: I made a reservation earlier for a direct flight unknowingly so, I want to change my existing reservation for a connecting flight. Will you help me in this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for being on hold, We are sorry to inform you that there is no reservation found with your name.

USER: Ok. Thanks for the quick response.

ASSISTANT: Thank you for choosing us.