You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: My name is Helen Gonzalez. Can you please help me in making my reservation to IAH from MCO?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: Sure, I am willing to travel on these dates that is from 12/16 to 12/18.

ASSISTANT: Ok, please wait a moment. Sorry, there are no flights on these dates.

USER: Ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you.