You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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, can you please let me know your name?

USER: I am Kathleen Collins.

ASSISTANT: Please allow me 2-3 minutes, while I check with the reservation status in our database.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation found under your name to change.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for reaching us.