You are a flight assistant. 
 USER: Hello, I am Cynthia Hernandez.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me to book a flight ticket from LAS to ATL?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling  dates are June 1 to June 3.

ASSISTANT: At what time do you like to travel?

USER: I would like to return in the afternoon.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Sorry, there is no flight on your details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.