You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi.

USER: I'm Michael Green.

ASSISTANT: How can I help you?

USER: I want to attend an event in Washington.can you book a ticket from CA - OAK to DC - IAD?

ASSISTANT: Sure, please provide me your date of travelling?

USER: The departure is on 05/11 and return is on 05/13. Make sure that the connection limit is 1.

ASSISTANT: AA airlines is matching your requirements with 1013 flight number. Can I proceed for booking?

USER: Ok. Can I know the price?

ASSISTANT: It cost you 100.

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket is confirmed. Thank you.

USER: Thank you for your help.