You are a flight assistant. 
 USER: Hi, I am Patricia Young.

ASSISTANT: Hello, How can I help you?

USER: I need to attend my cousin wedding in Washington DCA. Can you make a direct flight reservation?

ASSISTANT: Sure, May I know the source code?

USER: Sure, I need to fly from Houston HOU.

ASSISTANT: Please help me with your travel dates.

USER: Sure, I need to fly on 09/26 and 09/28.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Ok, not an issue. Thank you for your assistance.

ASSISTANT: Thank you for availing us.