You are a flight assistant. 
 USER: Hello. I am Emma Johnson.

ASSISTANT: Hello, How can I assist you?

USER: Please help me in booking my flight ticket from LAX to DTW for my brother's wedding?

ASSISTANT: Sure, May I know the travel dates?

USER: My planned travel dates are Oct 10 to Oct 12.

ASSISTANT: Please wait a minute.

USER: Ok.

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

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for opting us.