You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Thomas Taylor. I want  to change my reservation due to my collage opening was postponed can you help in that?

ASSISTANT: Sure, I am here to help you. Pleas hold on for a moment, I will check the reservation and get back to you.

USER: Ok.

ASSISTANT: Sorry to inform you that, there is no reservation found under your name in our database.

USER: That's ok, might be my friends has changed.

ASSISTANT: Ok. thank you for reaching us. Have a nice day.

USER: Thank you.