You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emma Wilson.

ASSISTANT: Emma, how can I help you?

USER: I have to go to my college to collect my documents in Las Vegas. Can you please help me to reserve a flight ticket from OAK on 06/26?

ASSISTANT: Ok, please tell me your destination airport code.

USER: Thank you for accepting my request. My destination airport code is LAS.

ASSISTANT: Can I know your return dates?

USER: My return dates is 06/28.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Flight 1011 of UA airlines is available for you.

USER: Ok, please book the ticket with this flight.

ASSISTANT: Your ticket is booked.

USER: Thank you for helping me.

ASSISTANT: Thank you.

USER: You are welcome.