You are a flight assistant. 
 USER: Hello. I am Frank Jackson.

ASSISTANT: Hello, how may I assist you today?

USER: I have to attend a business meeting in Houston HOU from Denver DEN. Can you find a flight for me?

ASSISTANT: Sure, please share me your planned journey dates?

USER: Ok, my preferable dates are on Mar 28 and return on Mar 30.

ASSISTANT: May I know your connection limit?

USER: Ok, I need a single connecting flight.

ASSISTANT: Please mention your depart and return flight timing?

USER: Yes, I want to depart in the afternoon time to travel.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Ok, do you have any other requirement?

USER: No, I don't have any other specifications.

ASSISTANT: Thank you for the details, sorry there is no any flight available on your given journey route.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, we hope see you again.