You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I have to attend for a work shop in DCA. Can you please make a reservation from ATL?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: Sure, I want to depart on Sept 2 and need to return on Sept 4.

ASSISTANT: Please help me with your name.

USER: Shirley Martin here.

ASSISTANT: Please let me know with your preferred airlines to fly.

USER: I prefer an normal-cost airline to travel.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Thank you. Shirley Martin, I am really sorry to inform you that there is no flight available for your journey.

USER: Ok, not an issue.

ASSISTANT: Thank you for understanding.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us. Have a great time.