You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you aid me to book a ticket from LGA to HOU?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are Feb 26 and Feb 28 respectively.

ASSISTANT: Do you need any specifications?

USER: I prefer for business class and make sure that connection limit is 1.

ASSISTANT: May I know your name.

USER: Deborah Collins here.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching our service.