You are a flight assistant. 
 USER: Hi, I am Brenda Young.

ASSISTANT: Hello, how can I help you at this moment?

USER: I need to travel to Los angeles LAS to establish new relationships. Can you make a reservation from Dallas & Fort Worth DFW?

ASSISTANT: Sure, when you planned to make your reservation?

USER: I need to travel on 02/28 and 03/01.

ASSISTANT: Ok, mention your price limit.

USER: Sure, it will be helpful if price limit is 500.

ASSISTANT: Ok, please standby.

USER: Sure, I need a direct flight.

ASSISTANT: Thank you for waiting. Unfortunately, no fights were available based on your given data.

USER: Ok, no worries at all.

ASSISTANT: Thank you for picking us.

USER: Thank you for your kind service.