You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I am Gregory Adams. I need to book a ticket from PHL to SFO.

ASSISTANT: Ok, please tell me your journey dates.

USER: My travelling dates are from 12/31 to 01/02. Make sure that there is 1 connection limit.

ASSISTANT: There is a flight matching with your requirements. Shall I proceed to book the ticket?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Airline is UA and the number is 1025. Thank you for contacting us.

USER: You are welcome.

ASSISTANT: Have a safe journey.