You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Could you do me a favour in making my reservation from DEN to IAH?

ASSISTANT: May I know your travel dates?

USER: Ok, my travelling dates are from 07/13 to 07/15.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: There is a flight available on your desired travel dates. May I know your name please?

USER: My name is Joseph Taylor.

ASSISTANT: Do you want to know anything else?

USER: Yes, please provide the plane details.

ASSISTANT: Sorry to say, there is no flight available.

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

ASSISTANT: Thank you for reaching us.