Hello, Jason Thomas this side.
user
Hello. How can I aid you today?
assistant
Due to some uncertainty in our travel plan, I need to do some changes in my reservation. Can you help me?
user
Sure Thomas, I will help you change your existing reservation.
assistant
Thank you.
user
Sorry Thomas, there is no reservation found on your name to change your existing reservation.
assistant
Ok, no issues. Thank you for your service.
user
Welcome. Thank you for choosing us.
assistant
You are welcome.
user