You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you book a flight ticket for my visit to Detroit?

ASSISTANT: Please mention your airport code.

USER: My airport codes for boarding the flight are PHL to DTW. I need a connecting flight.

ASSISTANT: May I know your trip dates?

USER: My travelling dates for journey are 09/11 to 09/13. My price limit is less than 500.

ASSISTANT: There is a flight for you with 1 connection and fare is 100. Shall I proceed?

USER: Sure.

ASSISTANT: May I know your name?

USER: Donald Roberts.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Most welcome.