You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I am Donna Hall, can you help me to book a flight from OAK to ATL?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My travelling dates are Apr 21 and Apr 23.

ASSISTANT: Ok, please wait for a while.

USER: My price limit is 500.

ASSISTANT: UA airlines is having a flight on that route with ticket fare of 100, shall I proceed for booking?

USER: Proceed with booking.

ASSISTANT: I have successfully booked your ticket with flight-1017, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.