You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How may I help you ?

USER: I am John Miller. I have a sports meeting at Phoenix, AZ- PHX, please help me with the reservation.

ASSISTANT: May I know the location you are travelling from ?

USER: Starting from Las Vegas, NV- LAS on 05/17 I want to end my journey on 05/19. I need a direct flight with price 200.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: I'm sorry there is no direct flight from Las Vegas to Phoenix with price 200.

USER: That's fine. Thank you for the information.

ASSISTANT: Thanks.