You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Scott Anderson.

ASSISTANT: What service you are expecting from us?

USER: Can you book a flight ticket on 12/17 and return ticket on 12/19 on a success meet on those days?

ASSISTANT: Yes, I can help you. Can you please mention your preferred airport codes?

USER: The regional airport codes are from ORD to ATL.

ASSISTANT: Ok, can you please give me a minute?

USER: Ok.

ASSISTANT: Sorry Scott, I didn't found any flight in this route on the dates you have provided.

USER: Sad to hear that one but anyways thank you for your service.

ASSISTANT: You are welcome. Thank you for choosing us.

USER: Wel. Welcome.