You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a ticket from IAH to OAK to visit Flower festival?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: My travelling dates are June 28 and June 30.

ASSISTANT: Do you have any connection limit?

USER: I want a direct flight.

ASSISTANT: Is there any other specifications in your journey?

USER: No.

ASSISTANT: May I know your name?

USER: I am Andrew Thomas.

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

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for reaching us.