You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I need to book a ticket from HOU to LAS. Could you book a ticket?

ASSISTANT: Can I have your journey dates?

USER: Departure is on Oct, 23 and return date is Oct, 25.

ASSISTANT: Do you need any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer normal-cost airlines.

ASSISTANT: There are no flights available on your routes.

USER: Thank you.

ASSISTANT: May I know your name for reservation?

USER: My name is Daniel Williams.

ASSISTANT: Thank you for choosing us.