You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Brandon Thomas. Please book a flight ticket on dates 11/19 and 11/21.

ASSISTANT: Sure, may I know your source and destination codes?

USER: My airport codes are ORD and LAS.

ASSISTANT: Do you have any other specifications?

USER:   I need a connecting flight.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: We found an airline: UA, flight number: 1023 and price is 200 with one connection.

USER: Please proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.