You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to book a ticket from IAD to MSP, can you please help me out?

ASSISTANT: Sure, I am here to help you. Can you please mention your travel dates?

USER: I am travelling on these dates Nov 7th and 9th.

ASSISTANT: Is there any connection limit preference?

USER: I need single connected flight.

ASSISTANT: May I know your name?

USER: Ryan Williams here.

ASSISTANT: Ok, please tell me your other preferences.

USER: I don't have any other preferences.

ASSISTANT: Sorry to inform you that, there is no flight in this route.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for choosing us.