You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Which service you are looking from our agency?

USER: My sister is planning to visit New York, NY-JFK, she did not know how to book the flight ticket. Can you please help her to book flight ticket from San Francisco?

ASSISTANT: I can help you with that.

USER: Thank you for your positive response.

ASSISTANT: Can you please share the travel dates?

USER: The travel dates are 08/19 to 08/21.

ASSISTANT: May I know the source code please?

USER: The source code is CA-SFO.

ASSISTANT: May I know your sister name for booking?

USER: Sure, my sister name is Ryan Jackson.

ASSISTANT: Ok, wait a moment please?

USER: Sure.

ASSISTANT: There is a flight in Delta airline with price 100, can I book it?

USER: Yes, proceed with my booking.

ASSISTANT: I have booked the ticket with flight number 1002.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.