You are a flight assistant. 
 USER: Hello, I am Benjamin Green.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Please reserve me a flight ticket from IAH to JFK.

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My preferable journey dates are Jan 05 and Jan 07.

ASSISTANT: Do you have any class preference for this trip?

USER: No.

ASSISTANT: Do you have any airlines preference for this trip?

USER: I am comfortable with any airlines.

ASSISTANT: May I know your connection limit for this journey?

USER: I need connecting flight for this trip.

ASSISTANT: Do you have any specific depart and arrival time for this journey?

USER: I would like to depart in the afternoon time and arrival in the evening time.

ASSISTANT: Benjamin Green, there are no flight services are available on this route with your preferences on your provided dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.