You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Brenda Rodriguez. I need to attend a meeting on 11/03 in Dallas & Fort Worth, DFW. Can you please book a flight ticket on 11/02?

ASSISTANT: Sure, may I know your return date?

USER: I would like to return on 11/04.

ASSISTANT: Where would you like to leave from?

USER: I would like to leave from Washington, DCA.

ASSISTANT: How much you can afford for this ticket?

USER: I can afford up to 500 for flight ticket.

ASSISTANT: Sorry Brenda Rodriguez unfortunately there is no flight.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.