You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to meet my uncle in LGA. Can you help me in booking flight ticket from IAH?

ASSISTANT: Sure, can you share your journey dates?

USER: My trip dates are Dec 06 to Dec 08.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: Ronald Martin here.

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

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for reaching us.