You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I serve you at this moment?

USER: I am Scott Evans.

ASSISTANT: OK.

USER: I need a reservation to go for a music festival at Phoenix to refresh myself.

ASSISTANT: Ok, I can help you with that.

USER: Can you please book a flight ticket under the range of 200?

ASSISTANT: May I know your dates of journey?

USER: I want to travel on 04/25 and return on 04/27.

ASSISTANT: Ok, let me know your airport abbreviates?

USER: I am heading to Phoenix, PHX from Philadelphia, PHL.

ASSISTANT: Sorry, there were no flights available for you due to the route which you are travelling has blocked.

USER: Ok, no problem. Thank you for the information.