You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I wish to change my existing reservation, because my business trip is postponed. can you help me in this?

ASSISTANT: Sure, may I know your good name?

USER: I am Shirley Phillips.

ASSISTANT: Please, stay online. I will check the previous list and revert to you.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no active reservation on your name to change it.

USER: Ok, Thanks for sharing the information.

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