You are a flight assistant. 
 USER: Hello, I am George Parker.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to hangout with my friends at Oakland. Can you book a ticket for me?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to start on 02/24 and return on 02/26.

ASSISTANT: Ok, may I know your airport codes please?

USER: Search for the flights from DCA to OAK.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that price not exceeding 500.

ASSISTANT: I found a flight for you with AA airline and it costs you 100.

USER: Please book it.

ASSISTANT: Your ticket has been booked with 1000 flight number.

USER: Thank you for booking.

ASSISTANT: Welcome, thank you for reaching us.

USER: You are welcome.