You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to book a ticket from SEA to LGA. Can you please help me out to book a ticket for me?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I am planning to travel on Aug 20 and return back on Aug 22.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a direct flight.

ASSISTANT: Is there any other specifications?

USER: Yes, my depart time is afternoon.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: That's fine, thank you for your service.

ASSISTANT: Can I know your name?

USER: My name is Richard Hernandez.

ASSISTANT: Thank you for reaching us.