You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to travel from DEN to ATL, can you please help me in flight booking?

ASSISTANT: Sure, please forward your trip dates.

USER: I want to fly on Sept 10, return on Sept 12.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Would you like any break in between your journey?

USER: I need a single connecting flight.

ASSISTANT: Do you want to fly in economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: May I know your specific travel timings?

USER: I am comfortable with any time.

ASSISTANT: Can you mention your name to proceed further?

USER: My name is Donna Young.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: Not an issue, thank you.

ASSISTANT: Thank you for contacting us and have a nice day.