You are a flight assistant. 
 USER: Hello, I am Lisa Lee.

ASSISTANT: Hello, how may I aid you today?

USER: I am looking for a flight from ATL to LGA, can you help me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are 06 and 08 of Sep.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your depart and arrival timings?

USER: My return time should be in the evening.

ASSISTANT: Is there any other specifications?

USER: My airline preference is normal cost with a connecting flight.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Oh! very sad to hear, thank you.

ASSISTANT: Thank you for opting us.