Hi.
user
Hello. How can I help you?
assistant
I  want to change an existing reservation due to sudden change in my trip. Can you help me?
user
Sure, I am ready to help you.
assistant
Thank you.
user
May I know your name?
assistant
Jennifer Robinson.
user
Sorry, there are no reservation found on your name.
assistant
No issue. Thank you for the information.
user
Thank you for reaching us.
assistant