Hi.
Hello.
Jacob Green here.
How may I render you today?
 Due to sudden change of my business meeting due to  some technical problem, I need to change my reservation.
Ok.
Will you help me in this?
Sure.
Thank you.
Please wait a minute.
Ok, I will wait.
There is no reservation found on your name to proceed further.
Ok, thank you for your information.
Thank you.