You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Paul King.

ASSISTANT: How can I assist you?

USER: I am planning to visit for a wedding in Washington DC-DCA.Can you please help me to book a flight ticket from CA-OAK?

ASSISTANT: Mention the dates of journey.

USER: I prefer to travel on 08/27  and 08/29.

ASSISTANT: There is a flight with connection 1 and number is 1003. Can I book it?

USER: Ok, book it.

ASSISTANT: Your ticket is booked with airline UA. Have a safe flight.

USER: Thank you for the help.

ASSISTANT: Welcome.