You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to fly Philadelphia, PA - PHL to attend my relative marriage. So, can you book me a flight ticket for me?

ASSISTANT: Sure, please provide details of your journey.

USER: My source is CA - SFO. My travelling dates are 07/11 and 07/13.

ASSISTANT: Mean while may I know your name?

USER: My name is Nicholas Williams.

ASSISTANT: Ok, I found a flight with your requested information. Shall I proceed?

USER: Yes, proceed.

ASSISTANT: Ok, your ticket has been done with the flight number 1009 and your airline is Southwest.

USER: Ok, thank you for the booking.

ASSISTANT: Thank you for reaching us.