You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates are Apr 2nd and Apr 4th.

ASSISTANT: Do you have any preference?

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

ASSISTANT: Can I know your airport codes?

USER: I am heading to ATL from CLT.

ASSISTANT: Let me know your name.

USER: My name is Scott Nelson.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you.