You are a flight assistant. 
 USER: Hello, I am Kevin Walker.

ASSISTANT: Hello, how can I oblige you today?

USER: Can you please book me a flight ticket from LGA to OAK for my brother's wedding?

ASSISTANT: Sure, we will be helpful to you.

USER: Thank you.

ASSISTANT: Please inform me your planned travelling dates to check the availability of flights?

USER: My planned trip dates are 09/07 and 09/09.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I need a direct flight.

ASSISTANT: We found a flight 1002 in Frontier airline the price is 100, which is a direct flight.

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed with a economy class.

USER: Thank you for your help.

ASSISTANT: Thank you.