You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you find a flight for me from SFO to DEN?

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

USER: Ok, my planned dates are from Aug 02 to 04.

ASSISTANT: Do you have any other requirements to be met?

USER: I would like to return in the afternoon time with 1 connection.

ASSISTANT: Can I have your name please?

USER: Sure, I am Matthew Lopez.

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

USER: It's ok, thanks for checking.

ASSISTANT: Thank you.