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