You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

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

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am planning to travel on Apr 19 and return back on Apr 21.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I am looking for a connecting flight..

ASSISTANT: Do you have any other requirements that you are looking for?

USER: My depart time is afternoon and return time should be evening.

ASSISTANT: Can you please provide your name to proceed further?

USER: My name is Ryan Lopez.

ASSISTANT: Sorry, there are no flights available at your request.

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

ASSISTANT: Thank you for contacting us, have a nice day.