You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: I want to book the flight ticket from BOS to HOU. Can you please help me?

ASSISTANT: Sure, Is there any class preference?

USER: I prefer to travel in economy class.

ASSISTANT: May I know your trip dates?

USER: My travel dates are May 20 and May 22.

ASSISTANT: Please provide your name.

USER: Charles Wilson.

ASSISTANT: Do you prefer a lay by in between the journey?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a minute.

USER: ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us.