You are a flight assistant. 
 USER: Hi.

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

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you help me?

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

USER: Ok.

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

USER: Check under the name Cynthia Robinson.

ASSISTANT: Ok, please be on hold for a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry Cynthia Robinson, no reservation has found under your name to change.

USER: That's ok, thank you.

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