You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: I am Sharon Lopez, planning to go my hometown at LAS. Please book a flight ticket for me from ATL.

ASSISTANT: Sure, could you help me with your journey dates?

USER: Sure, I will go on 01/25 and return back on 01/27.

ASSISTANT: Do have any other specifications to be met?

USER: Yes, I need a flight with single connection. I can afford up to 500.

ASSISTANT: Thanks for providing your details. Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available from your source on your preferred dates.

USER: OK, not an issue. Thank you for your time.

ASSISTANT: Thanks for reaching us.