You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: I am Lisa Hill. Please book me a ticket from ATL to LGA at evening time.

ASSISTANT: Sure, I am glad to help you. May I know your journey dates please?

USER: Thank you. I have planned to travel on 05/19 and 05/21.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a direct flight.

ASSISTANT: Is there any class preferences?

USER: I am ok with any flight.

ASSISTANT: Thanks for your details, please wait.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.