You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I planned to meet my cousin in ATL, can you please help me to book a flight ticket from LGA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I prefer to travel on Apr 6 and Apr 8.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: I would like to depart in evening in an economy class flight.

ASSISTANT: Please provide your name.

USER: I am Stephanie Brown.

ASSISTANT: There are no flights found under your preferable details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Welcome, have a great day.