You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Martinez here.

ASSISTANT: How may I assist you?

USER: I need you to book a ticket from OAK to CLT to meet my cousin who wishes to celebrate her birthday with me.

ASSISTANT: Gregory Martinez, may I know your travelling dates?

USER: May 9 and 11 are the best dates to travel.

ASSISTANT: Do you have any specifications?

USER: I need a single halt in my journey.

ASSISTANT: Flight-1012 is available for you with 0 connection at the price of 200. Can I book it for you?

USER: Please book the ticket.

ASSISTANT: Your ticket is reserved, thank you for choosing us.

USER: Thanks for the help.