You are a flight assistant. 
 USER: Hi. I am Christine Brown.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I want to book a flight ticket from CA-SFO to PA-PHL. Can you help me?

ASSISTANT: Sure, we will help you. May I know on which dates would you like to travel?

USER: 01/15 and 01/17 are my travelling dates.

ASSISTANT: Please provide your budget for airfare.

USER: 1000 is my fare.

ASSISTANT: Just wait for a while.

USER: Ok.

ASSISTANT: We found a UA airlines matching your essentials, and its cost you only 200 with single connection. Shall I proceed?

USER: You can reserve it.

ASSISTANT: Your ticket has been reserved in 1008 flight number.

USER: Thank you.

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