You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Pamela Wilson here. I have a Seminar in Atlanta.Can you please help me for booking a ticket?

ASSISTANT: Sure, I will help you with that. Can you provide your planned dates to travel?

USER: My departure date is 09/19 and return date is 09/21.

ASSISTANT: May I know from where you would like to fly?

USER: My airport codes are from NV-LAS to GA-ATL.

ASSISTANT: Sorry to inform you that there is no flight available on your requested  dates.

USER: Any way, thank you for the information.

ASSISTANT: Thank you for approaching us.