Hello, I'm Michelle Walker.
user
Hello Walker, how can I help you today?
assistant
I'm having convocation event at Oakland university, can you book my ticket from MCO to OAK?
user
What are your planned dates for this journey?
assistant
My preferable journey dates are from 04/20 to 04/22.
user
There  is no flight available for you in your  route.
assistant
It's ok, not an issue.
user
Thank you, have a nice day.
assistant
Thank you for providing information.
user