You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you please assist me with booking a flight from ATL to EWR?

ASSISTANT: Sure, I am here to help you.

USER: My journey dates are from Jan 11 to Jan 13.

ASSISTANT: Ok, do you have any specifications?

USER: My return time will be in evening.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you. May I know your name please?

USER: Myself Cynthia Perez.

ASSISTANT: Sorry Cynthia Perez, there are no flights available on your requested dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: Most welcome.