You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, please provide your itinerary dates.

USER: I would like to depart on June 6th and return on June 8th.

ASSISTANT: At what time do you want to travel?

USER: I am comfortable with any timings.

ASSISTANT: May I know your connection limit?

USER: I am looking for a direct flight.

ASSISTANT: Which class do you prefer?

USER: I need a economy class ticket.

ASSISTANT: Which airlines do you prefer?

USER: I am looking for a normal- cost airline.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure, take your time.

ASSISTANT: Delta airlines with flight 1026 is providing service with a direct flight and ticket costs you 200 in economy class.

USER: Please confirm the booking.

ASSISTANT: May I know your name?

USER: I am Rebecca Garcia.

ASSISTANT: Your ticket is confirmed. Flight departs at 23:00 PM and arrives at 3:00 AM.

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

ASSISTANT: Thank you for choosing us Rebecca Garcia.