You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Timothy Turner. I want to book a ticket from OAK to DCA, can you please help me?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are on Aug 10 and Aug 12. My depart time is afternoon.

ASSISTANT: Do you need any connection?

USER: Yes, I need one connection.

ASSISTANT: Sorry, I did not find any flights for you.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.