You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Richard Jackson here.

ASSISTANT: How may I help you out?

USER: I want to meet my sister on her birthday, so please book my ticket from LAX t o HOU.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My itinerary dates are Mar 16 and Mar 18.

ASSISTANT: Do you need any specifications?

USER: I want to return in the afternoon.

ASSISTANT: Can I know your preferences?

USER: I need a connecting flight.

ASSISTANT: Sorry, there are no flights found in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.