You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Larry Collins. I have to attend a meeting in New York, can you please help me to reserve a flight ticket from LGA to JFK?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Thank you. I am willing to travel on the dates of May 21 and May 23.

ASSISTANT: May I know your departure time and arrival time?

USER: The departing flight should be in the evening and the returning time must be in the morning time.

ASSISTANT: Do you require any specifications in your journey?

USER: Yes, I need a single connecting flight.

ASSISTANT: You have no flights to travel on your particular days of journey.

USER: It's ok, not a problem with that. Anyways thank you for helping me.

ASSISTANT: Thank you.