You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to attend a Tennis competition in Chicago ORD to EWR. Can you find a flight ticket for me?

ASSISTANT: Sure, may I know your name please?

USER: Ok, I am Joseph Clark.

ASSISTANT: May I know your planned travelling dates please?

USER: Ok, my itinerary dates are on Apr 20 and return on Apr 22.

ASSISTANT: Is there any specific class preference please?

USER: I need a direct flight to travel.

ASSISTANT: Sorry Clark, there is no flight found as per your travelling details.

USER: No, I don't have any  class preference.

ASSISTANT: Thank you for reaching us.

USER: Ok, thank you for your information.