You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking my ticket from CLT to DTW?

ASSISTANT: Sure, please provide your trip dates.

USER: My trip dates are from 10/15 to 10/17.

ASSISTANT: Do you have any connection limits?

USER: I need a single connecting flight.

ASSISTANT: Ok, may I know your name?

USER: Myself William Brown.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.