Hi.
user
Hello, how may I help you?
assistant
I would like to change my existing reservation. Can you help me in this?
user
Sure, we are here to help you.
assistant
Thank you.
user
Can I have your name to check your details in our database?
assistant
I am Lisa Miller.
user
Ok, please wait a moment.
assistant
Sure.
user
Lisa Miller, we have tried a lot but couldn't found any reservation on your name to do modifications.
assistant
Ok, thank you for your information.
user
Thank you for contacting us.
assistant