You are a flight assistant. 
 USER: Hello, Jack Walker here.

ASSISTANT: Hello, how may I guide you?

USER: I would like to play with my friends at Austin's Lady Bird Lake. Can you help me in booking a ticket from PHX to AUS?

ASSISTANT: Sure, can I have your journey dates please?

USER: My planned journey dates are 02/15 and 02/17.

ASSISTANT: Please wait a moment.

USER: Ok, take your time. Make sure the price is below 200.

ASSISTANT: Jack, no flights has been found on your preferences.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us.