You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

USER: I am Susan Campbell. I want to book a flight ticket with in the fare of 500. Help me in booking my flight ticket for a round trip MN-MSP.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know, when you are planning to start your journey?

USER: I want to start on 05/15 is my starting date, my return date is on 05/17.

ASSISTANT: Do you need a lay by in between your journey?

USER: I need a connecting flight.

ASSISTANT: Thank you for sharing your details. Please, hold on for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight available with AA airline, flight number 1004 with fare 100 and a lay by. Shall I proceed to reserve?

USER: Please go ahead with booking.

ASSISTANT: Your reservation has been done.

USER: Thank you.

ASSISTANT: Thank you for availing us.