Hi,.
Hello, How can I assist you today?
I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you help me with that?
Sure, I will help you with that. On what name, do I need to check your reservation status?
Thank you. Please check it on my name, Kimberly Phillips.
Please wait a while.
Sure, I will wait.
 Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.
Ok, not a problem. Thanks for your assistance.
Thank you for reaching us.