You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Dorothy Hill. I want to book a flight ticket from Los Angels to Denver CO-DEN to attend a private meeting with my business head, help me in booking my flight ticket from CA-LAX.

ASSISTANT: Sure, please mention your journey dates.

USER: 08/03 is my starting date, my return date will be 08/05.

ASSISTANT: May I know your price limit?

USER: I can spend up to 200.

ASSISTANT: Unfortunately, no flights were found on your requested dates.

USER: No problem, thank you for your fast response.

ASSISTANT: Thank you for choosing us.