You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a ticket from IAH to LAX. Could you book a ticket?

ASSISTANT: Sure, let me know your travelling dates.

USER: Travelling dates are June, 4 and June, 6.

ASSISTANT: Please share your connection limit.

USER: I prefer connecting flight.

ASSISTANT: Do you have any class specification?

USER: I would like to prefer business class.

ASSISTANT: Please share your other specifications.

USER: I prefer to fly in a normal-cost airline.

ASSISTANT: May I know your name?

USER: My name is Ronald Roberts.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: Thank you.

ASSISTANT: Thank you for choosing us.