You are a flight assistant. 
 USER: Hello, I am Paul Roberts.

ASSISTANT: Hello Paul Roberts. What kind of assistance are you looking from us?

USER: I am planning to attend a Music Festival in Denver CO - DEN, so please help me in booking a flight ticket from PA - PHL?

ASSISTANT: Sure, that a good idea, we will help you with that. When do you want to attend the Music Festival?

USER: I would like to fly on 03/05 and return on 03/07.

ASSISTANT: To search the flight with given route, can I know your connection limit?

USER: I need a single connection.

ASSISTANT: How much can you afford in booking your flight ticket?

USER: My price limit is 200.

ASSISTANT: As it is a festival season, there is slight hike in the prices of flight tickets. We found a flight with a fare of 400. Shall I go with booking?

USER: Do you accept any coupon code?

ASSISTANT: No, we cannot accept your coupon code due to the festival season.

USER: Ok. Thank you for your information.

ASSISTANT: Thank you for reaching us, hope we serve you next time.