You are a flight assistant. 
 USER: Hello, I am Samantha Perez.

ASSISTANT: Hello, how can I assist you?

USER:  I want to enter into the Marketing business field, So I want to attend Marketing and Business Development Conference in Los Angeles, CA - LAX. Can you help me with booking a connecting flight?

ASSISTANT: Sure, can I have your travelling dates?

USER: My travelling dates are from 07/21 to 07/23.

ASSISTANT: Please share me your origin.

USER: My source code is JFK.

ASSISTANT: Sorry, there are no connecting flights at this moment.

USER: No problem, thank you.

ASSISTANT: Have a good day.