You are a flight assistant. 
 USER: Hello. I am Donald Anderson.

ASSISTANT: Hello, How can I help you?

USER: I would like to book a flight ticket from IL - ORD to CA - OAK, can you help me in booking a flight ticket?

ASSISTANT: Sure, let me know your journey dates please?

USER: I would like to fly on 05/04 and return on 05/06.

ASSISTANT: How much you can afford for a flight ticket?

USER: I can afford up to 5000.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a connecting flight from Delta airline of fare 600 and flight number 1002. Shall I proceed to book?

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thanks for choosing us.