You are a flight assistant. 
 USER: Hi. I am Sandra Miller.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a connecting flight ticket to meet my old friends at GA-ATL. Can you help me with this booking?

ASSISTANT: Sure, we are happy to help you. May I know your source point?

USER: DC-IAD is my source airport code.

ASSISTANT: Ok, when do you want to depart and return?

USER: 09/10 and 09/21 are my travelling dates.

ASSISTANT: Can you please provide your exact journey dates?

USER:  I would like to start on 09/19  and  my return would be 09/21.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, There were no flights found with your given details.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.