You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Stephen Johnson.

ASSISTANT: How can I guide you at this moment?

USER: I am planning to attend music concert at JFK, can you please help me with booking a flight ticket from LAS?

ASSISTANT: Sure, I will help you. Please put forward your travelling dates?

USER: Sure, I would like to take off on 01/12 and return back on 01/14.

ASSISTANT: OK, do you have any other specifications?

USER: I need a flight with 1 connection.

ASSISTANT: There were no flight available at this moment due to bad whether conditions.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us. hope to serve you better next time.