You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to book a flight ticket to IAD from LGA, can you please help me out?

ASSISTANT: Sure, can you please share your journey dates?

USER: Sure, my trip dates are Mar 27 and Mar 29.

ASSISTANT: Are you looking for any preferred connections?

USER: I prefer direct flight.

ASSISTANT: Do you have any other specifications to be met?

USER: No more specifications.

ASSISTANT: Can I have your name to proceed further?

USER: My name is Timothy Jackson.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.