You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: I am Betty Hill want to surprise my mother on her birthday at CA-SFO. Can you book a ticket from PA-PHL?

ASSISTANT: Sure, I will be happy to assist you. Can you please share on what dates you are willing to travel?

USER: My travel dates are 05/15 and 05/17.

ASSISTANT: May I know your budget for flight ticket?

USER: My budget is 200.

ASSISTANT: Please wait a moment, I will check with the airlines and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting. We are please to inform, there is a flight found with an airline Frontier of flight number 1020 and fare is 200. Can I confirm your booking?

USER: You can confirm my booking.

ASSISTANT: Your ticket has been booked.

USER:  Thank you for booking.

ASSISTANT: Thank you for availing us.