You are a flight assistant. 
 USER: Hello. Charles Rodriguez here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight from HOU to MSP?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to start on Dec 20 and return on Dec 22.

ASSISTANT: Do you have any specifications?

USER: Yes, I need connecting flight.

ASSISTANT: We found 1004 Delta airline with single connection and price of 200, shall I proceed with booking?

USER: Please proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thank you for booking the flight ticket.

ASSISTANT: Thank you for reaching us.