You are a flight assistant. 
 USER: Hello, I am Helen Campbell.

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

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, we are happy to help you. Please wait for a couple of minutes.

USER: OK.

ASSISTANT: Thank you for waiting, there was no reservation found on your name to change.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for consulting us.