You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Could you please book a flight ticket from HOU to IAH?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: My travelling dates are May 27 and May 29.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight. And I prefer a normal cost airline.

ASSISTANT: May I know your good name?

USER: I am Jeffrey Martinez.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.