You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, can you help me with your name?

USER: My reservation was done under the name Gregory Thomas.

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

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

ASSISTANT: Thank you for reaching us.