You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to fly from ATL to LGA to meet my friend. Can you please help me to book a ticket?

ASSISTANT: Sure, kindly mention your travel dates?

USER: 08/19 to 08/21. I need direct flight.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: Not a problem, thank you.

ASSISTANT: May I know your name?

USER: Alexander Nelson.

ASSISTANT: Thanks for reaching us, have a good day.