You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight ticket from EWR to PHX to meet my friend. Can you help me in booking a connected flight?

ASSISTANT: Sure, may I know your travelling dates?

USER: My journey dates are Feb 05 and Feb 07.

ASSISTANT: Is there any class preference?

USER: I prefer a business class.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I already mentioned above.

ASSISTANT: May I know your name?

USER: I am David Nelson.

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.