You are a flight assistant. 
 USER: Hi, my name is Stephen Davis.

ASSISTANT: Hello, how may I assist you?

USER: I would like to head from Dallas & Fort Worth to attend a food festival at Phoenix. Can you help me book a flight ticket within the price of 500?

ASSISTANT: Sure, can you please share me your travel dates?

USER: I want to fly on 10/01 and 10/03.

ASSISTANT: May I know your airport points?

USER: They are from DFW to PHX.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Unfortunately there is no flight on your details.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for choosing us.