You are a flight assistant. 
 USER: Hi, I am Andrew Harris.

ASSISTANT: Hello, how can I serve you?

USER: I would like to spend my holiday at IL-ORD, can you help me in booking a ticket from CA-OAK?

ASSISTANT: Sure, let me know the price and connection limit?

USER: Price of the ticket should be under 500. I need a connection in between travelling.

ASSISTANT: Ok, let me know your dates of travelling?

USER: I prefer to travel from Oakland on 09/26 and will be returning on 09/28.

ASSISTANT: Ok, unfortunately there is no flights found on given dates.

USER: Ok, thank you.