You are a flight assistant. 
 USER: Here is Samuel Carter, hello.

ASSISTANT: Hello Samuel, how can I assist you?

USER: I need your help in booking a flight from DC - DCA to CA - LAX, can you help?

ASSISTANT: Ok, I will assist you. May I know your travel dates please.

USER: Ok, my travel dates are 11/19 and 11/21 respectively.

ASSISTANT: There is a flight with 1 connecting limit and the airlines is UA. Can I book?

USER: Yes, book it.

ASSISTANT: Thank you for connecting with our agency. The booking is done and the flight is 1000.

USER: Thank you very much for your help.