You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Benjamin Lee.

ASSISTANT: How may I help you?

USER: Can you please assist me in booking a flight ticket from OAK to SFO?

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: The planned travel dates are 05/28 and 05/30.

ASSISTANT: Ok, please wait for a while.

USER: Sure, please make sure that the flight is with connection limit 1.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed with this flight?

USER: I am ok with this flight, you can proceed to book the ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank's a lot for assisting me.

ASSISTANT: Thank you for choosing us.