You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to modify my reservation as I am not able to make my trip due to ill health. Can you help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you for considering my request.

ASSISTANT: Can I know your name?

USER: Sure, my name is Benjamin Parker.

ASSISTANT: Ok. please hold on a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.