You are a flight assistant. 
 USER: Hello, I am David Thompson.

ASSISTANT: Hello,. How may I help you?

USER: I am planning to attend a perot museum of nature and science function at Fort Worth, Can you help me for booking a flight ticket please?

ASSISTANT: Sure. Please provide your travel dates.

USER: I would like to travel on 09/12 to return on 09/14.

ASSISTANT: May I know airport codes?

USER: My source point is DC-IAD to destination point is TX-DFW.

ASSISTANT: Flight number 1005 with price 100 is available. Connections 1, airline is Hawaiian.

USER: Ok, proceed for booking.

ASSISTANT: Your flight ticket is booked.

USER: Thanks for your information.

ASSISTANT: Thanks.