You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a flight to travel for a meeting, can you please help me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I have planned to board on May 5th and return back on May 7th.

ASSISTANT: May I know your source and destination codes?

USER: I will fly from HOU to reach ORD.

ASSISTANT: Is there any class preference for you?

USER: I prefer to fly in economy class.

ASSISTANT: Your good name please.

USER: My name is Thomas Brown.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a direct flight.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem at all, thank you for the information.

ASSISTANT: Thank you for reaching us.