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