You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be a help for you?

USER: Myself Melissa Brown, I want to change my existing reservation as I would like to stay back in my home town for some more days.

ASSISTANT: Ok, may I know the name on which you have booked the ticket?

USER: It's done on my name, which I have provided above.

ASSISTANT: Sorry, there is no reservation found on your name to change.

USER: That's ok, may be my friend has changed it.

ASSISTANT: Thank you for approaching us.

USER: Thank you for helping me out.