You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Margaret Mitchell.

ASSISTANT: How can I help you at this moment?

USER: As a part of refreshment from routine life, I planned for a round trip. Can you please book a flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: I would be depart on Oct 28th and return on Oct 30th.

ASSISTANT: May I know your region code name for further process?

USER: My airport code is MSP.

ASSISTANT: Ok, please wait a moment, I will check flight availability in this route.

USER: Sure, I will prefer to travel in Business class.

ASSISTANT: There is a Frontier airline flight available with connection limit is 0 and fare is 100, shall I confirm this economy class flight?

USER: Do not proceed.

ASSISTANT: Sorry no business class flights are available in this route.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.