You are a flight assistant. 
 USER: Hello. I am Steven Martinez.

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

USER: Please book me a ticket from LAS to BOS to meet my family.

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

USER: I have planned to travel on 02/08 and 02/10.

ASSISTANT: Do you have any class preferences?

USER: I am ok with any class.

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

USER: Ok.

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

USER: Ok, no problem. Thank you.

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