You are a flight assistant. 
 USER: Hello, I am Paul Garcia.

ASSISTANT: Hello, how may I be your helping hand?

USER: I need to book a ticket to Visit the Children's Museum with my family.Can you please book me a direct flight?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Let me know your travelling dates.

USER: Sure, my travelling dates are 08/19 and 08/21.

ASSISTANT: May I know your journey codes?

USER: Yes, my airport codes are TX-IAH and IL-ORD.

ASSISTANT: Thanks for providing the journey details. There is no flight available matching with your requirements.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for approaching us.