You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Jacob Robinson. I want to celebrate my birthday at MSP, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, my travelling dates are June 17 and June 19.

ASSISTANT: May I know your departure time and arrival time?

USER: My departure time is morning.

ASSISTANT: Do you have any other requirements?

USER: I would like to travel in economy class.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you.