You are a flight assistant. 
 USER: Hi, I am John Roberts.

ASSISTANT: Hello, how can I help you?

USER: Please help me in booking a ticket from DC-IAD to IL-ORD.

ASSISTANT: Sure, please share me your travelling dates?

USER: I want to start my journey on Oct 6th and return on Oct 8th.

ASSISTANT: Do you have any specifications?

USER: I want a ticket within price 500.

ASSISTANT: We found 1027 Delta airline with single connection and price of 100. Shall I proceed with it?

USER: Yes, please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you.