You are a flight assistant. 
 USER: Hello, I am Lisa Clark.

ASSISTANT: Hello, how can I help you today?

USER: I need to fly from ORD to DEN. Can you please help me to book a connected flight ticket?

ASSISTANT: Sure, can you please share your journey dates?

USER: My journey dates are Dec 01 and Dec 03.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specifications?

USER: I am looking for departure time at evening.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.