You are a flight assistant. 
 USER: Hello, this is George Carter.

ASSISTANT: Hello. How may I help you?

USER: I am having some medical emergency. So, I need to to visit Washington to go to a hospital. Can you book a ticket for me?

ASSISTANT: May I know your dates of journey?

USER: I am planning to start on 11/09 and return back on 11/11.

ASSISTANT: May I know your airport codes?

USER: See, don't time for a single question. I cannot wait for a long time. Search for the flights available from OAK to IAD.

ASSISTANT: There is a flight with flight number 1015 with price is 200, can I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your booking is done.

USER: Thank you for the booking.