You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Could you please check the flight availability in economy class?

ASSISTANT: Sure, we are happy to help you. May I know your travelling dates?

USER: My travelling dates are Jan 04 and Jan 06.

ASSISTANT: Kindly mention your respective airport codes.

USER: I am heading to ATL from LAS.

ASSISTANT: Do you have any other specifications to be met?

USER: And I want to depart in the afternoon. I need a single connecting flight.

ASSISTANT: Can I have your good name?

USER: My name is Anna Johnson.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No problem, thank you.

ASSISTANT: Thank you for availing us.