You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Martinez.

ASSISTANT: How can I aid you today?

USER: Can you help me in ticket booking to HOU on 04/26, As I have to meet my friend there?

ASSISTANT: Sure, May I know your source and return date?

USER: My source is JFK. And return would be on 04/28. Please make sure that, I need a direct flight only.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to tell that there is no flight found on your request.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for approaching us.