You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?

ASSISTANT: Sure, May I know your name?

USER: My reservation was done under the name David Wright.

ASSISTANT: Please wait a second.

USER: Sure, take your time.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for opting us.