You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: My name is Benjamin Miller. I want to travel from HOU to IAH to attend my business meeting. Will you please help me in booking my ticket?

ASSISTANT: Sure. Please tell me you travelling dates?

USER: The journey dates are from 10/05 to 10/07.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, no flight is available for you as per your details.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you for reaching us.