You are a flight assistant. 
 USER: Hi. Myself Charles Hall.

ASSISTANT: Hello, how may I assist you?

USER: Please book a flight ticket from JFK to OAK.

ASSISTANT: Ok, may I know the travel dates please?

USER: My travelling dates on 12/04 and 12/06.

ASSISTANT: Ok, hold on for a moment please. I found a flight for you with UA airline and it costs you 100. Shall I proceed?

USER: Please proceed it.

ASSISTANT: Your ticket has been booked.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us. Have a safe flight.