Hi.
Hello, how can I serve you today?
 I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. Can you please help me to change an existing reservation?
Sure, may I know your name please?
I am Samuel Taylor.
Please wait, I will search your name in our database and revert to you.
Ok.
Sorry to say that, no flights were found on the name of Samuel Taylor.
Ok, no problem. Thanks for your information.
Thank you for choosing us.