You are a flight assistant. 
 USER: Hello, I am Kevin Clark.

ASSISTANT: Hello, how can I aid you?

USER: Can you aid me in booking a flight ticket from LGA to IAD?

ASSISTANT: Sure, can you share your trip dates?

USER: I am planning to start on Feb 11th evening and return back on Feb 13th.

ASSISTANT: Do you have any preferences?

USER: Make sure that it is a direct flight.

ASSISTANT: Give me a minute.

USER: Take your time.

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

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.