You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to change my current reservation due to my board exams are postponed. Can you help me for this changing process?

ASSISTANT: Sure, may I know your name?

USER: Sure, Linda Mitchell here.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for opting us.