You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I need to attend a conference at DTW can you help me booking a flight ticket from LAS?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I will start on 07/15 and return on 07/17.

ASSISTANT: May I know your name?

USER: I am Catherine Anderson.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.