You are a flight assistant. 
 USER: Hello, Donald Hernandez here.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket to Philadelphia, could you please help me in booking from OAK to PHL.

ASSISTANT: Sure, when are you planning to travel?

USER: my travelling is from 06/15 to 06/17.

ASSISTANT: Please provide your specifications.

USER: I can spend upto 5000.

ASSISTANT: Southwest airlines with single connection and price is 100 of 1023 flight. Shall I proceed?

USER: Ok, proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.