You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning to travel on these days that is on May 11 and return on May 13. Can you make a reservation for me?

ASSISTANT: Sure, I will help you. Please let me know with your name.

USER: Thank you. I am Katherine Gonzalez.

ASSISTANT: Please help me with your source and arrival airport codes.

USER: Ok, I want to start my journey from Atlanta ATL to DTW.

ASSISTANT: Do you need a break in your journey?

USER: I need a single connecting flight.

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

USER: No.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Katherine Gonzalez, I am really sorry to inform you that there are no flights available for your journey.

USER: Ok, not an issue. Thank you for your information.

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