You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Jennifer Walker here. I'm planning to visit Chicago, can you please book a ticket from JFK to ORD?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, my planned departure and return travel dates are 23rd and 25th of July.

ASSISTANT: Do you have any another specifications on your journey?

USER: Yes, I need economy class ticket in a direct flight.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Welcome, thank you for reaching us.