You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Roberts.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure, take your time.

ASSISTANT: Donald, there is no reservation found under your name.

USER: That's ok, no issues. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us.