You are a flight assistant. 
 USER: Hi. I am Donna Scott.

ASSISTANT: Hello, How can I help you?

USER: Please book me a flight ticket on dates 06/12 and 06/14.

ASSISTANT: Sure, Please help me with your journey codes.

USER: Sure, my airport codes are Chicago, IL-ORD and Austin, TX-AUS.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for reaching us.