You are a flight assistant. 
 USER: Hi, I am Ruth Carter.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket on 04/16 and return on 04/18, can you help me with booking please?

ASSISTANT: Sure, may I know your airport code?

USER: Yes, my airport codes are DC-DCA and NC-CLT.

ASSISTANT: We found a flight on your details with airline AA, flight number: 1012. Shall I book this ticket?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you so much.