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

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to book a flight ticket from MN-MSP to CO-DEN. Can you help me?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Thank you.

ASSISTANT: WElcome.

USER: 09/26 and 09/28 are my travelling dates.

ASSISTANT: Please wait for a while, I will check the availability.

USER: Ok.

ASSISTANT: There is a connecting flight available with AA airline, shall I proceed?

USER: You can proceed it for booking.

ASSISTANT: Your booking is done with flight number 1004. Happy journey.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a nice day.