You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want a flight from IAD to MSP. Can you book a flight from that route?

ASSISTANT: Sure, help me with the trip dates?

USER: My planned travel dates are 02/11 and 02/13.

ASSISTANT: May I know your name please?

USER: Sure, Stephen Mitchell here.

ASSISTANT: Do you have any preferences?

USER: I want a flight with single connection.

ASSISTANT: Sorry, no flights were found in your desired routes.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for opting us.