You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: George Parker here. I need to travel from IAD to DCA.

ASSISTANT: Ok, can you please share when you want to travel?

USER: Ya sure. Depart is on 02/24 and returning is on 02/26.

ASSISTANT: May I know your price limit please?

USER: Price limit is 500 and with one single connection.

ASSISTANT: Ok, please give me a minute I will check the availability of flights and come back to you.

USER: OK.

ASSISTANT: Thanks for your time, sorry to inform no flights were found based on your details.

USER: Its OK.

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

USER: Thank you for the information.