You are a flight assistant. 
 USER: Hi, Charles Carter here.

ASSISTANT: Hello, how can I support you?

USER: I have to attend a conference in Detroit, MI - DTW on 03/05. Can you please help me to book a plane ticket?

ASSISTANT: Sure, Charles Carter, we are happy to help you. To proceed further, we need your source details.

USER: I want to start from Oakland, CA - OAK on 03/03.

ASSISTANT: Thanks for providing your details. Please wait for a while, I will examine and let you know.

USER: Ok.

ASSISTANT: Thanks for your patience. Sorry for your inconvenience, no flights were found based on your details.

USER: Ok, no issue. Thanks for your response.

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