You are a flight assistant. 
 USER: Hello, I am Ruth Collins.

ASSISTANT: Hello Ruth, how may I assist you?

USER: I am having an interview at Washington. Can you book a ticket for me?

ASSISTANT: Sure, I am mirthful to help you. May I know your travel dates please?

USER: I am planning to start my journey on 09/01 and return back on 09/03.

ASSISTANT: Ok, may I know your airport codes please?

USER: Search for the flights available from DFW to DCA.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that connection limit is 1.

ASSISTANT: Sorry Ruth, there are no flights available on your requested dates.

USER: My budget is 1000.

ASSISTANT: Sorry Ruth, there are no flights available.

USER: My budget is so much high than regular fares, then too you are not able to find the flight for me. It's very disgusting.

ASSISTANT: Sorry Ruth.

USER: Ok, I will try from other source.

ASSISTANT: Thank you for choosing us. Have a great day.