Hello.
user
Hello.
assistant
I am Michelle Young. I want to change my existing reservation. Could you help me?
user
 Michelle Young, give me a moment, I will let you know the status of your reservation.
assistant
Ok.
user
I regret to inform that there are no flight tickets reserved by the name Michelle Young.
assistant
That's ok, no problem. Thank you.
user
Thank you for approaching us.
assistant