You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: I want to fly on June 13 and return on June 15.

ASSISTANT: Do you need break in between your journey?

USER: I need a single connection.

ASSISTANT: Please let me know if you have any other specifications.

USER: I would like to prefer a normal cost airline.

ASSISTANT: May I know your good name please?

USER: Myself Richard Mitchell.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.