You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am John Edwards. I am looking for a direct flight for my journey from CLT to LAS. Can you please help me to book my flight ticket?

ASSISTANT: Sure, I will help you. Can you please share your planned travel dates?

USER: I want to depart on Oct 22 and I have to return back in the evening on Oct 24.

ASSISTANT: Do you need a connecting flight?

USER: I need direct flight.

ASSISTANT: May I know your departure and return timings?

USER: I prefer to return in the evening.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: John Edwards, no flights has been found on your specifications.

USER: Oh my god! Anyway, thank you.

ASSISTANT: Thank you for choosing us.