You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: Virginia Rodriguez here. I want to book a flight on the route from CLT to DTW, can you help me out?

ASSISTANT: Please provide your travel dates?

USER: My travelling dates will be from 03/18 to 03/20.

ASSISTANT: Please specify connections limit?

USER: Ok, my connection limit is 1.

ASSISTANT: No flights are available according to your requirement.

USER: Oh! That's fine, thank you for checking anyways.

ASSISTANT: Thank you.