You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to change my reservation as my college annual day function got postponed. Can you please help me in changing the reservation made by the name Angela Davis?

ASSISTANT: Sure, I am glad to help you. Please give me a moment to check your ticket status.

USER: Sure.

ASSISTANT: Sorry Angela Davis, no reservation is available by your name.

USER: Ok fine, thanks for your response.

ASSISTANT: Thank you for reaching us.