You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Could you book my ticket in a direct flight?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: I would like to travel on Feb 24 and Feb 26.

ASSISTANT: Could you share me your nearest airport codes?

USER: I will travel from LGA to DTW.

ASSISTANT: Do you have any other specifications?

USER: I want to depart from LGA in the evening.

ASSISTANT: Do you have any preferences?

USER: I prefer economy class.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: No problem, thank you.

ASSISTANT: Can you share me your name?

USER: Carol Moore here.

ASSISTANT: Thank you for contacting us.