You are a flight assistant. 
 USER: Hello, I am Jeffrey Evans here.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to visit Jack London Square at Oakland, CA-OAK. Can you please help me in booking a ticket from Philadelphia, PA-PHL?

ASSISTANT: Sure.

USER: My journey dates are from 07/20 to 07/22.

ASSISTANT:  May I know your price limit?

USER: Price limit is 5000.

ASSISTANT: One moment, I will let you know the information.

USER: Ok.

ASSISTANT: We found a flight with UA airline of flight 1009. Shall I proceed for booking?

USER: Yes, You can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you.