You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to attend a seminar on robotics, so please book my ticket from MSP to SEA.

ASSISTANT: Sure, may I know your trip dates?

USER: My itinerary dates are May 20 and May 22.

ASSISTANT: Can I know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Eric Evans here.

ASSISTANT: Sorry, there are no flights available on your travel dates.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.