You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Donna Baker here, Can you book my tickets?

ASSISTANT: Sure Donna, can you provide your details please?

USER: Yes sure. I want to leave Philadelphia PHL on 05/07. I want to spend 3 days in San Francisco SFO and return on 05/09.

ASSISTANT: Can I know your connections and price limit please?

USER: Connection limit is 1 and price limit is 500.

ASSISTANT: Please wait a moment.

USER: OK.

ASSISTANT: I have found a flight for you with single connection and price is 100.

USER: Oh that's great!.

ASSISTANT: Shall I proceed in booking?

USER: Please book this flight.

ASSISTANT: I have booked your ticket with flight number 1000 and airline is Spirit.

USER: OK. Thank you.

ASSISTANT: Thank you for contacting us, have a safe journey.