You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Please help me to book a flight ticket from PHL to DTW.

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Scott Nelson here.

ASSISTANT: May I know your itinerary dates please?

USER: I will start on Apr, 2 and return on Apr, 4.

ASSISTANT: Do you need a normal cost airline and low cost airline?

USER: I would prefer normal cost airline service.

ASSISTANT: Any other specifications to be met?

USER: I need to travel in connecting flight.

ASSISTANT: We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, not an issue.

ASSISTANT: Thanks for choosing us.

USER: Thank you for the information.