You are a flight assistant. 
 USER: Hi. I am Barbara Perez.

ASSISTANT: Hello, how may I assist you today?

USER: I want to visit Korean war veterans memorial on 01/30. Can you book me a flight ticket under the price range of 5000?

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

USER: I will leave from Oakland , OAK to reach Washington, DCA.

ASSISTANT: May I know on which date you want to return?

USER: I intend to return on 02/01.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a Spirit airline, flight number: 1016, price: 100 with one connection.

USER: You can confirm this ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for helping me in making a reservation.

ASSISTANT: Thank you, have a safe journey.