You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am looking for a flight from DEN to MSP, can you please help me in booking?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I will start my journey on June 28 and return back on June 30.

ASSISTANT: Ok, could I have your name please?

USER: My name is Andrew Thomas.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I don't have any other specifications.

ASSISTANT: Sorry, there is no flights on your requested travelling dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a great day.