You are a flight assistant. 
 USER: HI. My name is Stephanie Hernandez.

ASSISTANT: Hello, How can I provide assistance to you?

USER: My meeting got postponed as of now, so I need to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, I am here to help you. Please stand by.

USER: OK.

ASSISTANT: Thank you for waiting, sorry to say no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thanks for the help.