You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a Marriage in Boston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, May I know your travelling dates?

USER: My travelling dates are Mar 22 and Mar 24.

ASSISTANT: Let me know your source code.

USER: My source airport codes is HOU.

ASSISTANT: Do you have any preferences?

USER: I prefer single connecting flight.

ASSISTANT: May I know your name?

USER: My name is Donald Carter.

ASSISTANT: Sorry, there are no flights found on your data.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.