You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Myself Gregory Campbell. I am looking for a flight from DEN to BOS, can you help me in booking?

ASSISTANT: Sure, let me know your planned journey dates.

USER: Sure, my planned travel dates are Nov 23 and Nov 25.

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

USER: I am looking for a connecting flight. Make sure that my return flight should be in the evening.

ASSISTANT: Ok, Please wait.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform you that, there were no flights found based on your details.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you.