You are a flight assistant. 
 USER: Hello, I am Donald Martin.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from ORD to PHL?

ASSISTANT: Sure, please share your planned trip dates?

USER: My trip dates are July 22 to July 24.

ASSISTANT: Let me know your connection limit?

USER: I need a single connection of flight.

ASSISTANT: Ok, any other requirements to be met?

USER: I want to return in the morning.

ASSISTANT: Any class preference?

USER: No.

ASSISTANT: Sorry, no flights found with your requested details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.