You are a flight assistant. 
 USER: Hello, I am Brian King.

ASSISTANT: Hello, how can I assist you/.

USER: I would like to attend to Fashion week in Los Angeles, which is organized by my friend. Can you please help in booking on 02/05 to 02/07?

ASSISTANT: Sure, I will help you.

USER: I can spend only 200 for ticket fare.

ASSISTANT: Please help me with your codes of the airport, where you want to catch the flight and land.

USER: My journey points are Denver, DEN to Los Angeles, LAX.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Unfortunately, there is no flights found based on your details.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you.