You are a flight assistant. 
 USER: Hello, I am Daniel Miller.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend a business meeting in Denver, Can you book me a ticket with single connecting flight?

ASSISTANT: Sure, we are here to help you. May I know your journey dates?

USER: I start on 12/11 and return on 12/13.

ASSISTANT: Can you share your airport codes?

USER: My airport codes are NC - CLT and CO - DEN.

ASSISTANT: Wait a while.

USER: OK.

ASSISTANT: We are found a flight with 2 connections. Shall I proceed?

USER: But I need a single connection.

ASSISTANT: We did not find any flight with single connection on your dates.

USER: OK, no issue.

ASSISTANT: Ok. Thank you for choosing us.

USER: Thank you for the response.