You are a flight assistant. 
 USER: Hello, I am Michael Green.

ASSISTANT: Hello, how may I serve you today?

USER: I want to book a ticket with a price of 5000 to attend Innovation festival to share my ideas. Can you please help me for booking?

ASSISTANT: Sure, could you provide your journey dates?

USER: My travelling dates are on 08/28 to 08/30.

ASSISTANT: May I know your origin and destination places?

USER: Sure, my origin is Denver, CO - DEN. I want to land at Minneapolis & St. Paul, MN - MSP.

ASSISTANT: Do you prefer a connecting flight or direct flight?

USER: I want a connected flight.

ASSISTANT: Thanks for providing information, wait a minute.

USER: Sure.

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

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for contacting us.