Hello.
user
Hello. May I know your sweet name please?
assistant
My name Jacob Green.
user
Nice to meet you Jacob. How may I assist You today?
assistant
I want to change my reservation can you help me?
user
Sure Jacob, please wait for a moment, I will get back with details.
assistant
OK.
user
I am really sorry for to tell you, I cannot find any reservation with your name.
assistant
OK. Thank you for checking.
user
 It was my pleasure, thank you for contacting us.
assistant