You are a flight assistant. 
 USER: Hello, Paul Walker here.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me by booking a flight ticket from EWR to LAS.

ASSISTANT: Sure, please share me your trip dates.

USER: April 30 and May 02 are my planned travel dates.

ASSISTANT: Is there any class preferences for you?

USER: I am good with any class.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please share if you want to travel in any specific time?

USER: I wish to depart in the afternoon.

ASSISTANT: Please wait for a while.

USER: Sure, I will be waiting.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for opting us.