You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Jonathan Hill, I would like to book a flight ticket with direct flight. Please, assist me to book a flight ticket.

ASSISTANT: Sure, may I know your source and destination airport codes please?

USER: Sure, my source code is SEA and destination code is DCA.

ASSISTANT: On which dates are you planning your journey?

USER: Sure, my planning dates of journey are 01/04 and 01/06.

ASSISTANT: Please wait for a while.

USER: Ok, sure.

ASSISTANT: Delta is having flight-1008 on that route with ticket fare of 100 and 1 connection, shall I book the ticket?

USER: Yes, please book.

ASSISTANT: Your ticket has been booked, have a safe flight.

USER: Thank you for booking.

ASSISTANT: Thank you so much for choosing us.