You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Kimberly Lee. I am looking for flight ticket booking, can you please help me out?

ASSISTANT: Yes, I am delighted to help you.

USER: I am planning to move from DFW to ORD.

ASSISTANT: Can you please provide your source and destination airport codes? Ok, may I know your travelling dates?

USER: I am flying from these dates 02/23 and 02/25.

ASSISTANT: Ok, please wait for a while. Sorry for the inconvenience, there is no flight available on your requested dates.

USER: Ok, no problem. Thank you for your services.

ASSISTANT: Thank you for contacting us.