You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to book a ticket from SEA to MSP. Could you book a ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Travelling dates are Apr, 28 and Apr, 30.

ASSISTANT: Do you prefer connection limit?

USER: I prefer direct flight.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the morning time.

ASSISTANT: May I know your name?

USER: My name is Donald Thompson.

ASSISTANT: Sorry, we found no flights on your trip dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.