You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please book a flight ticket from IAD to LGA?

ASSISTANT: Please provide your journey dates?

USER: My travelling dates are Feb 29 and Mar 02.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Timothy King.

ASSISTANT: Sorry currently there are no flights for your travelling dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.