You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Green.

ASSISTANT: How can I help you?

USER: I am planning to visit Las Vegas, can you please book me a ticket from SFO to LAS?

ASSISTANT: Sure, may I know your travel dates please?

USER: My planned dates of journey are from 12/27 to 12/29.

ASSISTANT: Ok, please be on hold.

USER: Sure, I will wait for your reply.

ASSISTANT: AA airlines is having a flight with travel charge of 100, shall I proceed for booking?

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket has been booked with flight-1002, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.