You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am Rachel Moore. I want to change my existing reservation as my meeting got postponed due to some technical issues. Can you help me in my changing reservation?

ASSISTANT: Sure, we are here to help you to change your recent reservation.

USER: Thank you.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for your time, there was no reservation found on your specified name.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for opting our service.