You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please book a flight ticket from LGA to ATL?

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: My trip dates are 04/15 and 04/17.

ASSISTANT: May I know your name please?

USER: Margaret Lewis here.

ASSISTANT: Are you looking for any other help from my side please?

USER: I am comfortable to travel with a single connecting flight.

ASSISTANT: Ok, wait for a moment please.

USER: I need to depart in evening. Sure, I will wait for your reply.

ASSISTANT: Sorry Lewis, there is no flight found as per your travelling details.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome.