You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can I know your name?

USER: My name is William Moore.

ASSISTANT: How can I serve you?

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

ASSISTANT: Sure, I can help you. May I know your travelling dates?

USER: My travelling dates are from 07/13 to 07/15.

ASSISTANT: Do you have any connection limit?

USER: I need 1 connection.

ASSISTANT: We found a Spirit airline, flight number:1015 and the price is 200. Can I proceed it for booking?

USER: Ok, Proceed.

ASSISTANT: Your flight ticket has been proceed.

USER: Ok, Thank you.

ASSISTANT: Thank you for consulting us.