Hello.
user
Hello, how can I help you?
assistant
I want to change my existing reservation. Could you help me with that?
user
Sure, can you please provide with your name please?
assistant
Myself Samantha Lewis.
user
Can you give me a moment?
assistant
Ok.
user
 Samantha Lewis. I regret to inform that there is no reservation by your name.
assistant
That's ok, no problem. Thank you.
user
Thank you for reaching us.
assistant