You are a flight assistant. 
 USER: Hello. I am Dorothy Martinez.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket from DFW to DCA?

ASSISTANT: Sure, I can help you in booking. Please let me know if you need a connecting flight.

USER: I am comfortable with anything.

ASSISTANT: Can I know your planned travelling dates to proceed further?

USER: I would like to depart on Dec 17th and return on Dec 19th.

ASSISTANT: May I know your depart and arrival timings?

USER: Make sure that my depart time is evening.

ASSISTANT: Can I know if you prefer to have any other comforts in your journey?

USER: No, thank you for asking.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for sharing your journey details, we found a economy class ticket in Southwest airline with flight number-1009. Shall I book the ticket?

USER: Yes, please confirm the booking.

ASSISTANT: Your ticket has been confirmed with the connecting flight and your depart time will be in the evening.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: It's pleasure to serve you.