Hello.
user
Hello,. How can I assist you today?
assistant
I need to change my existing reservation. Can you please change it?
user
Sure,. May I know your good name please?
assistant
David Taylor is my name.
user
Ok, please wait for a while I will the check availability and revert you.
assistant
Sure.
user
Sorry to inform you no flight reservation found in your given name.
assistant
No problem, thanks for your information.
user
Thank you for opting us. Have a nice day.
assistant