You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: I am Jonathan Jones, I am going to Oakland to visit Cull Canyon regional on 10/18. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My source is Washington DC-DCA and destination is CA-OAK.

ASSISTANT: When do you planned your return date?

USER: I will return on 10/20.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight found with UA airline of flight number 1010 and fare is 100.

USER: Ok, please proceed with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for helping me.

ASSISTANT: Thanks for choosing us and have a great day.