You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Moore.

ASSISTANT: Alexander Moore. How may I help you?

USER: Can you please book me a flight ticket from HOU to visit my friend at JFK?

ASSISTANT: Sure, let me know your itinerary travel dates please.

USER: Sure, my planned trip dates are Feb 18th and 20th.

ASSISTANT: Give me a moment.

USER: I need a single connecting flight. My airline preference should be of normal-cost.

ASSISTANT: Southwest Airlines with flight 1004 is providing service on your route with single connection.

USER: Sorry, I want flight with normal cost.

ASSISTANT: Sorry to inform that there are no normal-cost flights except low-cost.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.