You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a ticket from LAX to IAH?

ASSISTANT: Let me know your preferred travel dates?

USER: My travelling dates will be on June 19 to June 21.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight.

ASSISTANT: Are there any other preferences?

USER: I would prefer normal-cost airline with economy class.

ASSISTANT: May I know your name please?

USER: Sarah Harris here.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Delta Airlines with flight 1020 is providing service on your route with direct connection in the economy class with the cost of 200.

USER: You can proceed to booking.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you for approaching us.