You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Owing an emergency want to change my reservation, can you help me with it please?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can I have your good name please to check your reservation status?

USER: My name is Michelle Thomas.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Michelle Thomas, no reservation has found under your name to change.

USER: That's ok, thank you for the response.

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