You are a flight assistant. 
 USER: Hello. My name is Mary Campbell.

ASSISTANT: Hello, How can I assist you?

USER: I looking for a Single connecting flight in my journey. Can you please help me with booking?

ASSISTANT: Sure, May I know the journey codes?

USER: My preferable journey codes are ATL to DFW.

ASSISTANT: Please help me with your travel dates.

USER: I want to start my journey on 08/15 and return back on 08/17.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Anyway, thank you for the information.

ASSISTANT: Thank you for opting us.