You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please book a flight ticket from LAS to HOU?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My journey dates are Jan 03 and Jan 05.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your good name?

USER: I am Paul Green.

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.