You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you at this time?

USER: can you please help me in booking my flight from HOU to reach DCA, as I have to attend a meeting there?

ASSISTANT: Sure, I am here to help you with it.

USER: Thank you.

ASSISTANT: Please share me your planned travel dates.

USER: My planned travel dates are Sep 29th and Oct 1st.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight for my journey.

ASSISTANT: Sure, which class do you prefer to travel?

USER: I am comfortable in any class.

ASSISTANT: Is there any restriction with your depart and return time you have?

USER: No.

ASSISTANT: Do you have any other preference?

USER: I don't have any other preference.

ASSISTANT: May I know your name please?

USER: I am William Martin.

ASSISTANT: We have a direct flight from American airlines, number 1012 and it is costing 100. Shall I continue with it?

USER: Ok. Please confirm it, as it perfectly suits me.

ASSISTANT: The ticket booking has done in economy class.

USER: Thank you for the kind service.

ASSISTANT: Thank you.