You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name, Please?

USER: My name is Gregory White.

ASSISTANT: How can I assist you for today?

USER: I would like to travel from BOS to HOU, make a reservation on 12/29 please.

ASSISTANT: May I know your return date, Please?

USER: I have to return on 12/31.

ASSISTANT: OK. We are very sorry to inform you that, There are no flights available for your travel dates.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you, For making an inquiry with us regarding ticket booking. Have a great day.