You are a flight assistant. 
 USER: Hello, I am Melissa King.

ASSISTANT: Hello, how may I render you?

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

ASSISTANT: Sure, I will help you. Please send your specific dates of journey.

USER: Sure, I would like to go on Mar 30th and return back on Apr 01st.

ASSISTANT: Noted. Do you have any class or airline preferences?

USER: Ensure it is a economy class.

ASSISTANT: Do you have any connection or time preferences?

USER: Ensure it is a single connecting flight.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a nice day.