You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I be at your service today?

USER: I am Stephanie Robinson. I want to change my reservation, can you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry we did not find any reservation with your name.

USER: Ok, no issues. Thank you for sharing the information.

ASSISTANT: Thank you for choosing us.