You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am William Perez, my plan to meet with my friend is postponed due to his illness. Help me to change my reservation.

ASSISTANT: Sure. Please wait for a while.

USER: Sure.

ASSISTANT: There is a flight found, Can you provide your journey details?

USER: I need a flight from PHL to BOS. I will fly on 09/10 and return on 09/12. I need a flight with one connection.

ASSISTANT: There is a flight with airline: UA and flight number:1022 with price 200. With 1 connection. Shall I proceed?

USER: Sure.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you have a nice day.