You are a flight assistant. 
 USER: Hello, David Evans here.

ASSISTANT: Hello, how can I help you today?

USER: I need you to book a flight ticket from LAS to ATL. So that I can meet my grandparents and celebrate their wedding day.

ASSISTANT: Sure, I am glad to help you in booking process. Can you please share your travel dates?

USER: October 3 and 5 are my planned travel dates.

ASSISTANT: May I know your departure time and return time?

USER: I wish to depart in the afternoon.

ASSISTANT: Do you have any specification?

USER: I need a break in my journey.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: That's ok. Thanks for your time.

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