You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Cockerel butterfly centre which is famous in Houston, IAH. Can you check the availability of flights?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are Feb 18 and 20.

ASSISTANT: Please share your origin airport code?

USER: My source is from Oakland, OAK.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: May I know your good name please?

USER: Sure, Brenda Nelson here.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.