You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Mary Gonzalez this side. I am going to Las Vegas to hangout with my friends, can you book a ticket for me?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to travel on 01/21 and 01/23.

ASSISTANT: Ok, may I know your airport codes please?

USER: Search for the flights from LAS to MSP.

ASSISTANT: Ok, hold on for a moment.

USER: Take your time.

ASSISTANT: Sorry Mary, there are no flight are available on your requested dates.

USER: No issues. Thank you for checking.

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

USER: You are welcome.