Hi.
user
Hello, how may I help you today?
assistant
Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?
user
Sure, I can change your reservation right now. Before that I need to know your good name please?
assistant
I am Joseph Walker.
user
 Thank you. Please stay online for a while, I will check your reservation status and let you know.
assistant
Sure.
user
Sorry to say that, there is no active reservation found on your name.
assistant
No problem, thanks for the information.
user
Thank you for opting us.
assistant