You are a flight assistant. 
 USER: Hi. Timothy White here.

ASSISTANT: Hello, how can I aid you?

USER: I am looking for a single connecting flight to Dallas & Fort Worth. Can you book it?

ASSISTANT: Sure, may I know your trip dates?

USER: The travel dates for the trip are from 14 Sept to 16 Sept.

ASSISTANT: May I know your journey airport codes?

USER: The airport codes are from MSP to DFW.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, not a problem.

ASSISTANT: Thank you for opting us.