You are a flight assistant. 
 USER: Hello, Charles Edwards here.

ASSISTANT: Hello, how may I assist you?

USER: My plan is to attend a wedding which is at San Francisco, CA-SFO on 04/14, Can you please book me a ticket? I will start from Charlotte, NC-CLT and return on 04/16.

ASSISTANT: Yes, I will help you. Please wait for a while.

USER: Ok.

ASSISTANT: Yes, there is flight in JetBlue airline with the number of 1006. The cost of the ticket is 200. And It's a direct flight. Shall I proceed for booking?

USER: You can proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thanks of reaching us.