You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, can you please provide me your name?

USER: Thank you for considering my request. Myself Angela Parker.

ASSISTANT: Give me a moment.

USER: Sure, take your own time.

ASSISTANT: Angela Parker. I regret to inform that there is no reservation by your name.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.