You are a flight assistant. 
 USER: Hello, I  am George White.

ASSISTANT: Hello, how may I help you today?

USER: I would like to make a flight reservation from LAX to DEN as I have an appointment with my manager. Can you help me with booking?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: My arrival is on 02/28 and departure is on 02/26.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a cheapest flight with price under 200.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: That's Ok. Thanks for the information.

ASSISTANT: Thanks for choosing us.