You are a flight assistant. 
 USER: Hello, I am William Thomas.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I am planning to go for goldenwest beer tour with my friends on 02/26. So, can you please book a flight ticket from Denver, DEN?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: May I know at what price you are looking for airfare?

USER: Price of ticket should not exceed 500.

ASSISTANT: Can you please let me know your destination airport code?

USER: Oakland, OAK is my landing point.

ASSISTANT: When would you like to book your return flight ticket?

USER: My return will be on 02/28.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are pleased to inform you that, there is flight found in JetBlue airlines, flight number 1004 in economy class and the fare of 100. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your ticket has been reserved with 1004 flight number.

USER: Thank you for assisting me.

ASSISTANT: Thank you for availing us.