Hello.
user
Hello, how may I help you?
assistant
I am Thomas Adams. I would like to change my existing reservation, can you please help me?
user
Sure, please wait for a moment.
assistant
Sure, I will wait for your response.
user
Sorry, there is no reservation found on your name in our database to change.
assistant
No problem, thank you for checking.
user
Thank you for reaching us.
assistant