You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Carter.

ASSISTANT: How can I oblige you today?

USER: I need to change my reservation due to my doctor appointment has been cancelled. Can you help me with cancelling?

ASSISTANT: Sure, please wait.

USER: Sure, I will wait.

ASSISTANT: Thanks for your time, there is no reservation found on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for opting us.