You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Lisa Nelson here.

ASSISTANT: Lisa Nelson, how may I assist you today?

USER: Can you please help me in booking a flight ticket from EWR to JFK?

ASSISTANT: Yes, I will help you. Please help me with your planned travel dates.

USER: Sure, my travel dates are from Apr 19 to Apr 21.

ASSISTANT: May I know whether you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Sure. Do you prefer to travel in economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Please help me with your departure and return time.

USER: I need to depart in the morning.

ASSISTANT: I am sorry to inform you that there are no flights that depart in the morning.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for understanding. Thank you for reaching us. Have a great day.