You are a flight assistant. 
 USER: Hello, I am Jerry Carter.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to attend a Cultural Event in Washington DC - IAD, so please help me in booking a flight ticket from IL - ORD.

ASSISTANT: Do you need any connecting flight or direct flight?

USER: I need a direct flight.

ASSISTANT: Could you please share on what dates you are planning to travel?

USER: I would like to fly on 08/19 and return on 08/21.

ASSISTANT: May I know your budget for flight ticket?

USER: I can afford up to 1000.

ASSISTANT: Unfortunately there is no flights found  with your matching details in our data.

USER: Not an issue.

ASSISTANT: Thank you for opting us.

USER: Thank you.