Hi, I am Donna Lee.
user
Hello, how can I aid you?
assistant
  I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you help me with changing reservation?
user
Sure, I am willing to help you. Please stand by I will get back to you.
assistant
Ok.
user
Thanks for your time, sorry to say no reservation found with your name.
assistant
OK, no issues.
user
Thank you for reaching us, have a nice day.
assistant
Thanks for the help.
user