Hi.
user
Hello. How can I assist you?
assistant
I would like to change my reservation due to some emergency work at my home, can you please help me?
user
 Sure, let me know your name to check your reservation details in our database.
assistant
Myself Susan Jones.
user
Thank you, please wait for a while.
assistant
Sure.
user
We are regret to inform you that there is no active reservation on your name in our data.
assistant
That's fine, thank you for checking.
user
Thank you for reaching us.
assistant