You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I have your name please?

USER: As my business meet got postponed, I need your help in changing my earlier reservation.

ASSISTANT: Ok.

USER: My name is Dennis Brown.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for being waiting. We found that there was no reservation with your name.

USER: Not an issue, Thanks for your response.

ASSISTANT: Thank you Dennis Brown for choosing us.