You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Parker.

ASSISTANT: How may I help you out?

USER: I planned to meet my friend in DEN, can you please help me to book a flight ticket from EWR?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I prefer to travel on 03/05 and 03/07. I need a direct flight.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your time.