You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Anderson.

ASSISTANT: How may I serve you the best today?

USER: I need to attend  a cultural festival in Atlanta so please help me with flight ticket booking from New York.

ASSISTANT: Sure, when would you like to travel?

USER: Sure, I have planned to travel on dates of Aug 23 and Aug 25.

ASSISTANT: Help me with the airport codes that you have choosen?

USER: Sure, I would like to travel from LGA to ATL.

ASSISTANT: Do you prefer either an economy or business class?

USER: I am ok with any class to travel.

ASSISTANT:  Please let me know if you have any other preference.

USER: I would prefer to travel in direct flight so please check with that.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us. Hope serve you again.

USER: Most welcome.