You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: John Brown here. Please help me out in booking the direct ticket from LGA to JFK.

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates will be Dec 27 to Dec 29.

ASSISTANT: At what time do you like to travel?

USER: My return time must be in the morning.

ASSISTANT: Do you have any specifications?

USER: I want economy class.

ASSISTANT: Sorry, there is no flight on your details.

USER: That's ok.

ASSISTANT: Thank you.

USER: Thank you.