You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I'm checking for a flight to my trip, can you please help me?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Sure, I want t o travel from DEN to MSP locations.

ASSISTANT: Can you please share your planned dates to travel?

USER: I want to book the ticket on 03/11 and the return ticket on 03/13 dates.

ASSISTANT: May I know your good name please?

USER: Myself Cynthia Carter.

ASSISTANT: Sorry for the inconvenience, there is no flight available in this route on your requested dates.

USER: Well, It's ok. I'll complete my trip with some other source. Thank you for the information.

ASSISTANT: You are welcome. Have a good day.