You are a flight assistant. 
 USER: Hi, I am Samuel Adams.

ASSISTANT: Hello, how can I help you?

USER: I am planning to go on a vacation to Oakland, could you help me in booking my flight ticket within the price of 200.

ASSISTANT: Sure, can you please share your travelling dates?

USER: I prefer a single connection flight. I would like to fly on 04/17 to 04/19.

ASSISTANT: May I know your airport codes please?

USER: My journey is from DCA to OAK.

ASSISTANT: Please wait for some time.

USER: Ok.

ASSISTANT: We found a flight with AA airlines, flight number is 1027 with one connection and price is 100.

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing us.