You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to meet my cousin on her birthday, can you please book the flight ticket from DTW to ORD?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can I have your travelling dates?

USER: I want to depart on 05/08 and return on 05/10.

ASSISTANT: Ok, in the meanwhile may I know your name please.

USER: My name is Kevin Moore.

ASSISTANT: Sorry for the inconvenience, there are no flight's available based on your travelling dates.

USER: Not an issue, I will find an other way. Thank you for the information.

ASSISTANT: Thank you for reaching us.