You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please book a flight ticket from IAD to MSP?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: Sure, my journey dates are Apr 26 and Apr 28.

ASSISTANT: Do you need any break?

USER: I would prefer connecting flight.

ASSISTANT: May I know your name?

USER: Myself Andrew Miller.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: We found a connecting flight with an UA airlines, flight number:1011.

USER: Please proceed with my booking.

ASSISTANT: Your flight ticket has been reserved with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.