Hi.
user
Hello, How can I best serve you today?
assistant
Could you please book a flight ticket from HOU to OAK?
user
Sure, can you please mention your depart and arrival dates of your journey?
assistant
My trip dates are Nov 19 and Nov 21.
user
Do you like to go with a connecting or direct flight?
assistant
I need a direct flight.
user
May I know if you prefer to have any other comforts in your journey?
assistant
I prefer a normal cost airline.
user
Can I know your good name to proceed further?
assistant
I am Stephen Baker.
user
Sorry, no flights are available in this route as per your requested dates.
assistant
Not  a problem, thank you for the information.
user
Thank you for choosing us.
assistant