You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Robert Clark.

ASSISTANT: How may I aid you today?

USER: Please book a flight ticket from Oakland, OAK to Chicago, ORD.

ASSISTANT: Sure, I will book your ticket.

USER: Thank you.

ASSISTANT: But we need your travel dates also, can you please share me that?

USER: Sure, My travelling dates are from 04/06 to 04/08.

ASSISTANT: How much you can afford for this ticket?

USER: I can bare up to 500.

ASSISTANT: We found a flight on your details with airline Spirit, flight number: 1018. May I book this ticket for you?

USER: Proceed with my booking.

ASSISTANT: Your ticket has been conformed with the fare of 100.

USER: Thank you for kind help.

ASSISTANT: Thank you.