Hi.
Hello. How may I help you today?
Owing to an emergency, I want to change my existing reservation.
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?
Sure, Linda Hill here.
Ok, please wait a minute I will get back to you with the present status.
Sure.
Thank you for waiting, I have checked in reservation list to change your ticket but could not find any reservation with your name.
Ok, no issues. Thank you for your information.
Thank you for approaching us.