You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I am here to help you before that I need your name to check your details.

USER: My reservation was done under the name Jeffrey Johnson.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, I could not find any reservation with your name in our database.

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

ASSISTANT: It's my pleasure, have a nice day.