You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Could you please help me to book a flight ticket from DEN to attend a live concert in SFO?

ASSISTANT: Sure, I am gleeful to help you with that. May I know your planned travel dates?

USER: Sure, I am planning to start on 03/09 and my return date will be on 03/11.

ASSISTANT: Do you have any other specifications?

USER: I want to fly with the connecting flight.

ASSISTANT: May I know your name please?

USER: I am Melissa Johnson.

ASSISTANT: Sorry to say that, there are no flights found on this route as per your travel dates.

USER: That's ok, not an issue.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for your information.