You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, may I know your good name?

USER: My reservation was done under the name Barbara Roberts.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there is no active reservation found on your name.

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

ASSISTANT: Thank you for reaching us.