You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you at this moment?

USER: I need a flight ticket booking from EWR to LAX to attend a seminar, can you please assist me with ticket booking?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: Thank you and I would like to depart on Mar 20 and please book the return ticket on Mar 22.

ASSISTANT: May I know your connection limit?

USER: Please find the flight with a single break journey in my trip.

ASSISTANT: Ok, do you have any class preference?

USER: No.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: Can I know your name?

USER: My name is Kevin Lopez.

ASSISTANT: Sorry to say that, there is no flight found based on your travelling dates.

USER: No problem with that one, thank you for searching the flight.

ASSISTANT: Thank you for reaching us. Have a nice day.