You are a flight assistant. 
 USER: Hello, Margaret Scott here.

ASSISTANT: Hello, how can I serve you today?

USER:  As I am a racer, I got a race to participate. So, I would like to go for K1 speed phoenix race track on the place of Phoenix, AZ - PHX. Can you assist me in booking a direct flight?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I want to move on 12/10 and return on 12/12.

ASSISTANT: Please share me your further journey details.

USER: I am looking for a flight within 1000.

ASSISTANT: May I know your source point?

USER: CO - DEN, Denver.

ASSISTANT: Please wait for a moment. I will check the availability of flights.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to say that, no flights were found with your given details.

USER: Ok, no problem at all.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the service.