You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicole Moore.

ASSISTANT: How can I aid you?

USER: Due to my ill health, I am unable to attend my company meet at Dallas. Can you please help me by changing my existing reservation?

ASSISTANT: Ok, please wait a moment.I will check your reservation status.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: Ok, not an issue. May be something went wrong while booking the ticket previously. Thank you for providing information.

ASSISTANT: Ok, thank you for reaching us.