You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: I need a ticket to Washington DC-DCA from Denver, CO-DEN.

ASSISTANT: Ok. May I know your price limit?

USER: Price limit is 1000.

ASSISTANT: Please, mention your journey dates.

USER: Departure is on 01/09 and 01/11 is my return date.

ASSISTANT: Do you need any halt in your journey?

USER: Please provide direct flight.

ASSISTANT: Sorry to inform you that, No direct flight available in your journey locations.

USER: I am Margaret Martin. Thanks for your assistance.

ASSISTANT: Ok. Thank you for choosing us, have a nice day.