You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Adams.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, will you provide your travelling dates please?

USER: I would like to take off on 09/29 and return on 10/30.

ASSISTANT: Please mention your airport codes that you want to travel.

USER: My nearest source airport code is OAK and destination airport code is DCA.

ASSISTANT: Please reconfirm your travelling dates.

USER: Sorry, my return date is 10/01.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Based on your details, there is a flight with price 100 and the connections 1 is available.

USER: Please proceed with the booking.

ASSISTANT: Your ticket is booked. The flight number is 1020 and the airline is Southwest.

USER: Thank you for your service.

ASSISTANT: Welcome, have a great day.