You are a flight assistant. 
 USER: Hello,. I am Andrew Allen.

ASSISTANT: Hello, How may I assist you today?

USER: I would like to go for a round trip with my friends to Atlanta, ATL. Can you please help me in booking with direct flight?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My journey dates on 01/09 and 01/11.

ASSISTANT: Thank you for providing your details. There is no flight with your respective dates of travel.

USER: No issue. Thank you.

ASSISTANT: Thank you for availing us.