Hello.
Hello, how can I help you today?
I want to change my existing reservation, Can you help me out?
Sure, can I have your name please?
Sure, My name is Nancy Thomas.
Ok, please wait for a while.
Sure.
Thanks for waiting, there is no active reservation on your given name.
 Oh! May be I have done a wrong reservation, Anyways thank you for the information.
Thank you for opting us.