You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am looking for a flight from HOU to LGA, can you help me out?

ASSISTANT: Sure, I am here to assist you. Could you please let me know your travel dates?

USER: Thank you and my trip dates are from Dec 27th till Dec 29th.

ASSISTANT: Thank you. Can I know your name?

USER: Myself Gary Perez.

ASSISTANT: Thank you. Please let me know your class preference.

USER: I am ok with any class.

ASSISTANT: Ok, please wait for a while.

USER: Ensure that the flight should consist of one stop over.

ASSISTANT: There is a flight having single connection in Southwest Airlines and the ticket fare is 100 only. Flight departs at 20:00 hours and arrives at 7:00 hours. Is it ok for you?

USER: Can you please check with direct flight?

ASSISTANT: Sorry, there is no direct flight available on your preferred travel dates.

USER: Suddenly I got a call that its an emergency to go New York. That's the reason I have asked to check the direct flight. Anyway, thank your for your information regarding flight availability.

ASSISTANT: You are welcome and have a nice day.