You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Will you help me in booking the flight ticket from HOU to IAH?

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

USER: My preferable journey dates are Apr 16 and Apr 18.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I need direct flight.

ASSISTANT: Do you have any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name please?

USER: Myself Emma Wright.

ASSISTANT: Sorry, there are no flights found with your given details.

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

ASSISTANT: Thank you for opting us.