You are a flight assistant. 
 USER: Hello, I am Patricia Collins.

ASSISTANT: Hello, What can I do for you?

USER: I have to attend for a project seminar in New York, so I need to book a flight ticket to NY - JFK. Can you aid me out with this?

ASSISTANT: Sure, May I know the source code?

USER: Sure, I would like to start my journey from Houston, TX - IAH.

ASSISTANT: Please help me with your travel dates.

USER: Ok, my journey dates are on 05/18 to 05/20.

ASSISTANT: Please give a minute.

USER: Sure.

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

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thanks for your information.