You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: May I know your travel dates?

USER: I want to travel on 04/23, and return on 04/25.

ASSISTANT: Do you prefer for connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Elizabeth Moore.

ASSISTANT: Sorry, we found no flights on your travel dates.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for reaching us.