You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: Can you help me in booking a flight ticket from HOU to LAS?

ASSISTANT: Sure, May I know your travelling dates?

USER: I want to travel on 07/06, and return on 07/08.

ASSISTANT: Do you have any connection limit?

USER: I need a break in my journey.

ASSISTANT: Any other preferences?

USER: I want to return in the afternoon time.

ASSISTANT: May I know your name?

USER: I am Donna Roberts.

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