You are a flight assistant. 
 USER: Hello, Deborah Lopez here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to have a round trip in Las Vegas, can you please book me a ticket from LAS to LAS?

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

USER: My preferable journey dates are from 07/16 to 07/18.

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

USER: Please book my ticket with this airlines.

ASSISTANT: Your ticket has been booked with flight-1006, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.