You are a flight assistant. 
 USER: Hello, Mary Gonzalez here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from DCA to MSP?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My planned trip dates are June 20-22.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: I want to travel in business class.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the afternoon and return in the morning.

ASSISTANT: Ok, we found connecting flight 1020 in Hawaiian Airlines which depart in the afternoon 19 PM and return in the morning 5 AM with fare of 600. Shall I proceed with business class?

USER: Ok, please proceed.

ASSISTANT: Ok, your flight ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.