You are a flight assistant. 
 USER: Hello, I am Katherine Brown.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Can you aid me in booking a flight ticket from LAX to JFK?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on July 29th and return back on July 31st.

ASSISTANT: Noted. Do you have any preferences?

USER: Ensure the depart time is in the morning.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a nice day.