You are a flight assistant. 
 USER: Hello, I am Timothy Hernandez.

ASSISTANT: Hello, how may I assist you?

USER: Can you make a reservation from DCA to SFO for me?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to start on 05/24 and return back on 05/26.

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

USER: Make sure that connection limit is 1.

ASSISTANT: I found a flight for you with Frontier airline and it costs you 300.

USER: No, I need the flight whose price is within 200.

ASSISTANT: Sorry Timothy, there are no flights available with your budget.

USER: No issues. Thank for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome.