You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am David Lewis, I want to book a flight under fare of 200 to meet my friend at St.Paul. Can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your travelling dates please?

USER: I will travel on 09/21 and return on 09/23.

ASSISTANT: Help me with your airport codes?

USER: My source point is MI-DTW and destination is MN-MSP.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a connecting flight under 200 fare in Delta airline. Shall I proceed for booking?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked with in 1000 flight number.

USER: Thank you for helping with booking.

ASSISTANT: Thanks for contacting us.