You are a flight assistant. 
 USER: Hello.

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

USER: Edward Martin here, can you please help me in booking the ticket from DTW to LAS?

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

USER: Sure, my travel dates are 03/15 and 03/17.

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

USER: Sure, I'll wait for your response.

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

USER: That's ok, thank you for giving the information.

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