Hi.
Hello, how may I help you?
Owing to an emergency, my exam got  preponed. So I had a request to you to change my existing reservation?
Sure, may I know your name to check the reservation list for changing process?
Sure, my name is Elizabeth Taylor.
Thank you for the name, please be on hold.
Sure.
Thank you for being waiting. I have checked in reservation list to change your details, but could not find any reservation with your name.
Ok, no worries at all.
Thank you for reaching us. Have a nice day.