You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I need a flight from OAK to DCA to attend a meeting at my client location. Can you book?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My trip dates are from 05/17 till 05/19.

ASSISTANT: Here is a flight with 1 stop and price is 100 in UA airlines, can I proceed with it?

USER: Please proceed with it.

ASSISTANT: Your ticket has been booked with 1001 flight.

USER: Thank you for your help.

ASSISTANT: May I know your name?

USER: I am John Smith.

ASSISTANT: Thank you.

USER: Welcome.