You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please book a flight ticket from MCO to HOU?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates, please?

USER:    My travelling dates are Dec 13 and 15.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to return in the evening.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am ok with any class.

ASSISTANT: Do you have any other specifications?

USER:     I need a direct flight.

ASSISTANT: Sorry to tell you that, there are no flights found on this route as per your travel dates.

USER: That's fine, thank you for the response.

ASSISTANT: May I know your name for documentation purpose?

USER: My name is Patrick Young.

ASSISTANT: Thank you for reaching us, have a great day.