You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your assistance?

USER: I made a reservation earlier for a direct flight unknowingly so, I request you to please change my reservation for a connecting flight.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name to check the reservation and to change it?

USER: Sure, my name is Katherine Garcia.

ASSISTANT: Please wait for a couple of minutes I will check in our date base and revert to you.

USER: Ok, sure.

ASSISTANT: Thank you for your precious time, I hardly tried to find out your name in our date base, but there is no reservation found on your name.

USER: Ok, no problem. May be I have done with some other airline.

ASSISTANT: Thank you for contacting us.

USER: Anyway thanks for your kind response.