You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I am Susan Thompson. I would like to change an existing reservation as my exam got post pone. Can you help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while Susan Thompson.

USER: Sure.

ASSISTANT: There is no active reservation found on your name in our data list.

USER: Not an issue. Thank you for your information.

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