You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Donald Thomas. I want to book a ticket from LAS to SFO, can you help me?

ASSISTANT: Sure, may I know your trip dates?

USER: My travel dates are Dec 13 and Dec 15.

ASSISTANT: Do you need a halt in between journey?

USER: I need a single halt in my journey.

ASSISTANT: We found a flight on UA airline, flight number as 1021 with the fare of 100. It is a connecting flight.

USER: You can book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for availing us.