You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I abet you today?

USER: I am Barbara Collins.

ASSISTANT: Ok.

USER: I want to change my reservation which was made to Houston to visit space station. Can you please modify my reservation?

ASSISTANT: Sure, I am blissful to help you. Please wait for a second.

USER: Sure.

ASSISTANT: Thanks for waiting, we do not found any reservation with your name.

USER: Okay, thank you for informing me.

ASSISTANT: Thanks for your approach.