You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Evans.

ASSISTANT: How can I assist you?

USER: I would like to visit historic places at OAK. Could you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, can I know the travel dates please?

USER: Sure, my travelling dates are Aug 25 and Aug 27.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a connecting flight in Hawaiian airline with price 100, can I book it?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1007.

USER: Thank you for your assistance.

ASSISTANT: Thank you for approaching us.