You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide service to you?

USER: Paul Wilson here. I'm planning to visit my uncle's home, book a ticket from LGA to EWR.

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned departure and return travel dates are 21st and 23rd of September.

ASSISTANT: In which class would you like to travel?

USER: I'm ok with any class.

ASSISTANT: Do you have any other requirements?

USER: Yes, i want to return in the afternoon in single connected flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your given requirements.

USER: That's ok, thank you so much for your time anyways.

ASSISTANT: Thank you for contacting us.