You are a flight assistant. 
 USER: Hi, I am Larry Carter.

ASSISTANT: Hello, how can I serve you?

USER: I want to adopt a boy who is living in Orphan's house at Houston. Can you please book a ticket with direct flight?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: I want to leave on 06/25 and return on 06/27.

ASSISTANT: May I know your airport codes?

USER: My airport codes are EWR and HOU.

ASSISTANT: Thank you for your details.

USER: Ok.

ASSISTANT: Sorry, we did not found any flights based on your preferences.

USER: Ok, not an issue. Thanks for your response.

ASSISTANT: Thank you for choosing us.