You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Frank Collins.

ASSISTANT: How may I assist you today?

USER: I want to book a flight ticket to attend Sport's Event in Washington, DC - DCA. Can you please make a flight reservation from Phoenix, AZ - PHX?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: Do you need a stopover in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Kindly share your fare preference.

USER: My fare limit is 500.

ASSISTANT: May I know your planned travelling dates to proceed further?

USER: I want to travel on 05/02 and need to catch return flight on 05/04.

ASSISTANT: Thank you for providing your journey details, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found found with your essential details.

USER: It's ok, not an issue.

ASSISTANT: Thank you for opting us.

USER: Thanks for your service.