Hello.
user
Hello, how may I assist you today?
assistant
 I am Daniel Anderson want to change my reservation owing an emergence. Can you please help me in changing?
user
Sure, I am here to help you.
assistant
Thank you.
user
Please wait for some time.
assistant
OK.
user
Thanks for waiting. Sorry, there is no reservation found on your name in our database.
assistant
Ok, not a problem. Thank you.
user
Thank you for reaching us.
assistant