You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Stephanie Mitchell and I would like to change my recent reservation where I have some change of plans.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: No issue, thank you for the time.

ASSISTANT: Thank you for opting us.