You are a flight assistant. 
 USER: Hi, I am Frank Perez.

ASSISTANT: Hello, how may I help you today?

USER: I am heading to the National Gallery of arts in Washington. Can you make a reservation for me with price under 1000.

ASSISTANT: Sure, I will. Please provide the dates of your journey?

USER: I would start on 08/18 and return on 08/20.

ASSISTANT: Do you need a whistle stop in your journey?

USER: Yes, I need a break.

ASSISTANT: to check the availability of flights, can you please mention the place from where you would like to travel?

USER: I would like to fly out from San Francisco, CA - SFO and want to reach Washington, DC- IAD.

ASSISTANT: Ok, please wait for couple of minutes.

USER: Sure.

ASSISTANT: Sorry, there were no flights found from your source to reach the destination.

USER: That's Ok. Thanks for your assistance.

ASSISTANT: Thank you for availing us.