You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me in booking a flight ticket from CLT to DEN?

ASSISTANT: Sure, let me know your travelling dates.

USER: I want to travel on 02/12, and return on 02/14.

ASSISTANT: Please share your connection limit.

USER: I am comfortable with any connection.

ASSISTANT: Is there any other specifications?

USER: I want to return in the evening time, and prefer for economy class.

ASSISTANT: Can I get your name?

USER: I am Sandra Taylor.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.