Hello, I am James Allen.
user
Hello, how may I help you?
assistant
Due to emergence, I want to change my existing reservation. Can you help me with it?
user
Sure, please wait a moment I'll check the details of your reservation.
assistant
Ok.
user
Sorry to say, in my database I didn't found any details regarding your reservation.
assistant
Thank you.
user
Thanks for reaching us. Have a nice day.
assistant