Hello.
user
Hello. How can I assist you today?
assistant
I want to change my existing reservation, can you please help me with this?
user
Sure, will you mention your name please?
assistant
I am Charles Williams.
user
Please give me a moment.
assistant
Sure.
user
There is no reservation found under your name.
assistant
No problem, thank you.
user
Welcome, have a great day.
assistant