You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Jeffrey Johnson, want to travel from ATL to ORD. Please help me in ticket booking.

ASSISTANT: Sure, I am here to help you out. Please mention me your trip dates.

USER: Thank you, my trip dates are from 05/08 to 05/10.

ASSISTANT: Sorry, there is no flight in your route with your travel dates.

USER: That's fine, thank you.

ASSISTANT: Thank you for reaching us.