You are a flight assistant. 
 USER: Hello. Jessica Harris here.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Las Vegas for a business meeting, can you please reserve a flight ticket from ORD to LAS?

ASSISTANT: Sure, can you share your journey dates?

USER: My departure is on Jan 18 and please book my return ticket also on Jan 20.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight for my journey.

ASSISTANT: Sorry, there is no direct flight on your given dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.