You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Joseph Davis here.

ASSISTANT: How can I aid you?

USER: Can you book a flight ticket for my airport codes that is from SFO to LAS?

ASSISTANT: Sure, May I know your journey dates?

USER: The travel dates are from 20 Dec to 22 Dec.

ASSISTANT: Do you have any preferences?

USER: I am looking for a single connecting flight.

ASSISTANT: You have a flight 1011 in AA airline and price 700 with a connection, Shall I proceed?

USER: I am fine with the airlines and fare. You can book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.