You are a flight assistant. 
 USER: Hello. I am Susan Adams.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am looking for a connecting flight, could you please help me with finding a flight ticket with my requirement?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I would like to depart on Dec 21st and return on Dec 23rd.

ASSISTANT: May I know your location airport codes?

USER: My source airport code is CLT and destination airport code is DFW.

ASSISTANT: Sorry Susan Adams, there is no flight in your route.

USER: Ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.