You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy King.

ASSISTANT: How can I aid you?

USER: I am looking for a flight from SFO to IAD, can you help help me out please?

ASSISTANT: Sure, can you please share your trip dates?

USER: I need a flight from 02/29 till 03/02.

ASSISTANT: Here, I found a flight for you with 1 connection and fare is 500. Shall I proceed?

USER: I need a flight with my budget of 200.

ASSISTANT: Sorry, no flights are available on your budget.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Welcome.