You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ryan Wilson.

ASSISTANT: How can I help you?

USER: Can you help me in booking from IAD to LGA, as there is a business meeting to attend?

ASSISTANT: Let me know your travel dates.

USER: My trip dates are Feb 9 to Feb 11.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight which return in afternoon.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: No issue, thank you.

ASSISTANT: Thank you.