You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please reserve a flight ticket from SEA to MSP?

ASSISTANT: Sure, can you share me your planning dates?

USER: Sure, my planned travelling dates are Aug, 23 and 25 respectively.

ASSISTANT: Do you have any class preference?

USER: I am comfortable to travel in any class.

ASSISTANT: Is there any other specifications?

USER: I would like to fly in direct flight.

ASSISTANT: Please forward your good name.

USER: Sure, my name is Steven Lee here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for opting us.