You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I wan to book a flight ticket from MSP to IAD. Could you help me in booking?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My travelling dates are from June 13-15.

ASSISTANT: Ok, may I know your name?

USER: Jack Walker here.

ASSISTANT: Ok, do you have any connection limit?

USER: I need 1 connecting flight.

ASSISTANT: Ok, may I know your specifications?

USER: I prefer for business class.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, no problem. Thank you.

ASSISTANT: Welcome, have a nice day.