Hello.
user
Hello. How can I  help you?
assistant
I have planned to attend a meeting but suddenly I got a call that the meeting has postponed to some other dates, so can you please modify my previous flight ticket booking?
user
Sure, may I know your name please?
assistant
Thank you for your positive response and my name is Jason Mitchell.
user
I am sorry no reservation found on your name.
assistant
No issues with that one, thank you for your information. Welcome.
user
Thank you for choosing us.
assistant