You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: I am planning for a business trip from TX-IAH to TX-HOU.Can you please book a flight ticket?

ASSISTANT: Sure, provide me the dates of travelling.

USER: I prefer to on travel on 08/09 and 08/11.

ASSISTANT: I am really sorry there is no flight available based on your requirements.

USER: OK, that's fine .

ASSISTANT: For our documentation purpose, we need your name. Will you please tell me your name?

USER: Sure, I am Linda Clark. Thank you for your information.

ASSISTANT: Thank you Clark. Have a nice day.