You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley Harris.

ASSISTANT: How may I help you out?

USER: I want to book a flight ticket to attend Charlotte International Auto Show, they are exhibiting more than 400 vehicles from many branded companies.

ASSISTANT: Ok.

USER: Can you please book a ticket to CLT?

ASSISTANT: Sure. Please share the source point.

USER: Detroit, DTW is my nearest boarding point.

ASSISTANT: I need your travel dates to proceed further.

USER: Travelling dates are 03/09 to 03/11.

ASSISTANT: Ok. Thanks for sharing your details. Unfortunately no flights found in search.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us, Have a nice day.