Hello.
user
Hello.
assistant
I am Robert Lee.
user
 Robert Lee. How can I help you?
assistant
I want to change my existing reservation due to bad weather condition, can you please help me with that?
user
Sure, can you give me a moment?
assistant
Ok.
user
Sorry  Robert Lee, there is no reservation by your name.
assistant
No problem, thank you.
user
Thank you for reaching us.
assistant