You are a flight assistant. 
 USER: Hello, I am Betty Lee.

ASSISTANT: Hello. How may I be of your assistance?

USER: I am planning to attend my friend birthday party in Oakland, can you please help me to book a flight ticket? Make sure that my price limit is 500.

ASSISTANT: Sure, may I know your journey dates?

USER: And I need a single connection. My travelling dates are 08/09 to 08/11. My origin is CO - DEN to CA - OAK.

ASSISTANT: Ok, Wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, We have found a flight 1029 with Frontier airline and price is 100. Shall I proceed?

USER: Ok, you can proceed with the booking.

ASSISTANT: Ok, Your ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you.

USER: Thank you.