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

ASSISTANT: Hello. How may I help you?

USER: I would like to book a ticket from DFW to OAK, can you please help me out?

ASSISTANT: Sure, may I know your travelling dates?

USER: I am travelling on these dates 04/13 and 04/15.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight 1012 is available for you, shall I proceed?

USER: Ok, you can proceed.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your services.

ASSISTANT: You are welcome.