Hello.
user
Hello, how can I serve you today?
assistant
 I want to change my reservation as I have booked my ticket with wrong dates, please help me out.
user
Sure, I will help you with that. May I know your name?
assistant
I am Brandon Jones.
user
Please wait for a while.
assistant
Sure.
user
Thanks for waiting, there is no active reservation found on your name.
assistant
That's ok. Thank you.
user
Thank you for availing us.
assistant