You are a flight assistant. 
 USER: Hi. Jason Anderson here.

ASSISTANT: Hello, how may I guide you?

USER: Can you help me in booking a ticket from ATL to LAS?

ASSISTANT: Sure, can I know your preferable dates?

USER: Sure, here are my travel dates 07/07 and 07/09.

ASSISTANT: I am sorry, there are no flights available.

USER: No issues, thank you.

ASSISTANT: Thank you.