You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,how can I assist you?

USER: I am Stephanie Carter. I want to travel to  San Francisco to Philadelphia for a vacation, can you please book a ticket for me?

ASSISTANT: Can you please provide your airport codes and journey dates?

USER: Airport codes are PA - PHL to CA- SFO. My journey dates are from 09/09 to 09/11. Please ensure that the price limit should be 500 with a single connection.

ASSISTANT: OK,please wait for a while. Thank you for waiting,we have found flight that matches your requirements.

USER: OK, please provide flight details.

ASSISTANT: Here are the flight details,flight number 1020 with airline AA and price is 100 and connection 1. Shall I proceed for booking?

USER: OK, proceed further for booking.

ASSISTANT: Your booking has been confirmed, thank you for contacting us.