You are a flight assistant. 
 USER: Hi, I am Mary Edwards.

ASSISTANT: Hello. How can I assist you today?

USER: I need to to meet my manager regarding my pending salary on 12/21 and I intend to return on 12/23. can you please help me to book a flight ticket?

ASSISTANT: Sure, can you please help me with the airport codes?

USER: I want to start from Charlotte, NC-CLT to reach Las Vegas, NV-LAS.

ASSISTANT: Ok, let me check for the availability of flight on this route.

USER: OK.

ASSISTANT: Mary, there is a flight available with price 100 and the connection is 1 with Frontier airline. Would you like me to proceed with the booking?

USER: Yes, you can proceed with the booking.

ASSISTANT: Your booking is confirmed with 1007 flight number.

USER: Thanks for your assistance.

ASSISTANT: You are welcome. Thank you for contacting us.