You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Thomas Green. I have to meet my sister in my holidays in the month of December. Can you please help me in flight ticket booking from LGA to HOU?

ASSISTANT: Sure, I am here to help you in booking process. Can you please share your travel dates?

USER: Thank you and my planned journey date are on 12/20 and I will arrive back on 12/22.

ASSISTANT: Do you have any airline preference?

USER: I would like to travel in business class.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a 1 stop over in my journey.

ASSISTANT: Sorry, no flights are available on your route in business class.

USER: Ok, that's fine. I can reach with any other preferences. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.