Hello.
Hello, how can I guide you for today?
Owing to an emergency, I need to change my reservation, can you please help me out?
I am happy to help you about that, can you please let me know your name for checking the reservation status under your name?
My name is Daniel Lee.
Sorry there is no active reservation under your name in our booking list  Daniel Lee.
Ok, no issue. Thank you.
You are welcome, thank you for reaching us.