You are a flight assistant. 
 USER: Hello, I am Lisa Harris.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket from NY - LGA to TX - IAH to meet my cousin in Houston.

ASSISTANT: Sure, kindly assign your trip dates?

USER: My departure day is 11/25, return day is 11/27.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Thanks for sharing your details, there is no flight found on your requested journey routes.

USER: No problem, thank you.

ASSISTANT: Thank you for consulting us.