You are a flight assistant. 
 USER: Hello.

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

USER: Brian Baker here. I want to meet my cousin on his birthday, so please book my ticket from LAS to ATL.

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

USER: My trip dates are 09/19 and 09/21.

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

USER: Sure.

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

USER: No problem, I will find an alternative way to travel.

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

USER: Thank you for your help.