Hello.
user
Hello. How can I help you?
assistant
Helen Nelson here. I want to change my existing reservation, Can you help me for that?
user
Wait a moment, I am checking the status of your reservation.
assistant
Ok, take your time.
user
Sorry Helen Nelson, there is no reservation found with your name.
assistant
It's ok, thank you for your information.
user
Thank you for reaching us.
assistant
Welcome.
user