Hello.
user
Hello, how can I assist you today?
assistant
Will you please assist me to change my existing reservation as my plan to meet my friend got postponed?
user
Sure, let me know your name please?
assistant
I am William Collins.
user
 Sorry, no reservation found on your given name in our database to change it.
assistant
That's ok, no issue. Thank you for your information.
user
Thank you for contacting us.
assistant