You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Helen Collins here.

ASSISTANT: How may I assist you?

USER: I would to book a ticket to Chicago, can you please book a ticket from OAK to ORD.

ASSISTANT: Sure, help me with the trip dates?

USER: My trip dates are 11/25 to 11/27.

ASSISTANT: We found a flight in an airline Frontier with 1023 number having a single connection price of 200. Shall I proceed to book?

USER: Please proceed.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.