You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Myself Mark Johnson, can you help me to book a flight ticket from Los Angeles, CA - LAX to Dallas & Fort Worth, TX - DFW?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Ok, my travel dates are 05/07 and 05/09 respectively.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, please book a direct flight.

ASSISTANT: Sorry, there are no direct flights on your requested dates.

USER: Ok, not a problem. Thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.