HI. Jack Campbell here.
user
Hello, how may I gudie you?
assistant
Can you book a ticket from DTW  to OAK?
user
Sure, can I know your preferable dates?
assistant
Ok, here are my travelling dates 07/12 and 07/14. Please go with 0 connection.
user
I am sorry, there are no flights available.
assistant
No issues, thank you for the help.
user
Thank you.
assistant