Hello.
user
Hello. How may I serve you today?
assistant
I want to change my existing reservation, can you please help me with this?
user
Sure, I'll try to help you in changing an existing reservation.
assistant
Thank you.
user
 I need some basic information to check your ticket details, can you please tell me your full name?
assistant
I am Linda Collins.
user
Ok, please wait a minute I will get back to you with the present status.
assistant
Sure.
user
I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
Ok, no problem. Thank you for your information.
user
Thank you for approaching us.
assistant