You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to book a flight ticket from HOU to JFK.

ASSISTANT: Sure, can you share your trip dates?

USER: My travel dates are from Aug, 05 to Aug, 07.

ASSISTANT: Do you have any specifications?

USER: I need to return in the evening and I prefer a single connecting flight.

ASSISTANT: May I know your name?

USER: Jonathan Adams.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.