You are a flight assistant. 
 USER: Hi, I am Ronald Young.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket on 10/15 and 10/17, so can you help me with booking please?

ASSISTANT: Sure, may I know your airport codes?

USER: Yes, my airport codes are Washington, DC-IAD and Houston, TX-IAH.

ASSISTANT: At what price range are you looking for?

USER: I want a ticket with in price 200.

ASSISTANT: We found a economy flight on your details with airline UA, flight number: 1015 and with fare of 100.

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you.