You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, will you please let me know on what name it was reserved earlier?

USER: My reservation was done under the name Carolyn Mitchell.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, we could not find any reservation active under your name in our data base.

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

ASSISTANT: Thank you for approaching us.