You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you with today?

USER: Myself Elizabeth Hill. Can you please help me in booking a flight?

ASSISTANT: Sure, I can help you with that.

USER: My source and destination is CA-OAK to IL-ORD.

ASSISTANT: Elizabeth, can you please help me with the source and the destination airport codes? Could you please help me with the travelling dates?

USER: I would like to travel from 05/04 to 05/06.

ASSISTANT: Thank you for providing.

USER: Kindly, note my price limit is 500 and connection is single.

ASSISTANT: Sure, let me check that for you.

USER: Not an issue.

ASSISTANT: Elizabeth, there is a flight available at your request. Would you like me to proceed the booking?

USER: Sure, book it.

ASSISTANT: Your booking is confirmed. Your flight number is 1019 and the airline is Spirit.

USER: Thank you for the quick response.

ASSISTANT: You are most welcome. Have a great journey.