You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Angela Parker. Can you please assist me in changing my existing reservation as my plan to attend a seminar got postponed?

ASSISTANT: Sure, I am gleeful to help you. Please wait for a moment to check your details.

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

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.