You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I am Ryan Nelson. I want to book a flight from LAX to DFW to meet my friend, can you please help me to book a flight ticket?

ASSISTANT:  Ok, may I know your travel dates?

USER: My trip dates are 12/20 to 12/22.

ASSISTANT:  Do you have any preference?

USER: I need a halt.

ASSISTANT: We found a connecting flight Hawaiian with flight number 1005 and fare is 300.

USER: Ok, book the ticket.

ASSISTANT:  Your booking is done.

USER: Thanks for your service.

ASSISTANT: Thank you.