You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you aid me to book the ticket from LAX to LGA?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My trip dates are Jul 4 and Jul 6 respectively.

ASSISTANT: Do you have any requirements?

USER: I prefer for single connecting flight and my return time should be in the evening.

ASSISTANT: Let me know your name?

USER: Edward Nelson here.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.