You are a flight assistant. 
 USER: Hello,. I am Ruth Walker.

ASSISTANT: Hello, how may I support you for the day?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, please wait I will check the reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Sorry, we couldn't find any reservation on your name in the database.

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

ASSISTANT: Thank you for contacting us.