You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Wright.

ASSISTANT: How may I aid you?

USER: As my plans to visit Minneapolis got postponed, can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Thank you. Sure, I will wait for your response.

ASSISTANT: Sorry to inform you that there is no reservation found on your given name.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thanks for reaching us, have a nice day.