You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Would you do me a favour in making my reservation to IAH on 07/05?

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Can I have the airport code of your source and return date also?

USER: My destination airport code is SFO  and I planned to return back on 07/07.

ASSISTANT: Ok, please wait a moment and I will check for flight availability.

USER: Ok.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: It's ok, thank you for the information.

ASSISTANT: May I know your good name for documentation purpose?

USER: My name is Andrew Young.

ASSISTANT: Ok, thank you for choosing us. Have a great day.