You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you please book me a flight ticket on the name of David Brown on 08/15?

ASSISTANT: Sure. May I know your airport codes please?

USER: My airport codes are DCA - DFW.

ASSISTANT: May I know your return date?

USER: I intend to return on 08/17.

ASSISTANT: Do you have any specifications?

USER: Yes, I can afford up to 200.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found connecting flight 1017 in AA airline with fare of 100. Shall I proceed?

USER: Ok, please confirm with it.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.