You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Eric Thomas, want to travel from ATL to JFK. Please help me in booking my ticket.

ASSISTANT: Sure, please provide your trip dates.

USER: Sure, my trip dates are from 11/16 to 11/18.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flights available on these dates.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.