You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is William Perez.

ASSISTANT: How may I guide you?

USER: I need to book a flight ticket from HOU to DFW. Please help me in booking a flight ticket.

ASSISTANT: William Perez, I am here to help you for this. When would you like to travel?

USER: My trip dates are from 09/10 to 09/12.

ASSISTANT: Do you have any airline preference?

USER: No, I am comfortable with any airline.

ASSISTANT: At what time are you willing to depart and return?

USER: I need to depart in the evening.

ASSISTANT: Please wait for a while,.

USER: Sure.

ASSISTANT: As per your criteria, there is a flight with American Airlines and the ticket fare is 200. Shall I proceed for this?

USER: Please go ahead.

ASSISTANT: Your ticket is reserved in economy class with the flight-1009. Your departure time is 0:00 Am, and again your arrival time is 2:00 Am.

USER: Thank you for booking.

ASSISTANT: Thank you very much for contacting our agency.