Hi.
Hello. How can I aid you?
I just want to change an existing reservation as my meeting got post pone due to some technical issues.
Sure, We are here to help you.
Can you please help me with this? Thank you.
May I know your name?
I am Stephen Lee.
Give me a minute.
Sure.
  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.
That's ok, no problem. Thank you.
Thank you for reaching us.