You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I assist you?

USER: I intend to fly from Washington to attend a press meet at San Francisco. Can you help me book a flight ticket within the price of 500?

ASSISTANT: Please provide your travel dates.

USER: My dates of travel are 06/07 and 06/09.

ASSISTANT: Please provide your travel codes.

USER: My journey is from IAD to SFO.

ASSISTANT: Please mention your name.

USER: My name is Betty Young.

ASSISTANT: Ticket can be booked with airline Southwest, connections 1, flight number 1009 and price is 100.

USER: Proceed for booking.

ASSISTANT: Ticket is booked.

USER: Thank you for the booking.

ASSISTANT: Thanks.