You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Please let me know your name, so that I can check the system.

USER: Thank you for considering my request. Myself Brenda Evans.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Brenda Evans, I regret to inform that there is no active reservation by your name.

USER: Not an issue wit this one, thank you for the information.

ASSISTANT: Thank you very much for reaching us.

USER: Thank you for your service.