You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist 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 with that.

USER: Thank you for considering my request.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Timothy Taylor.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Sure , I will wait for your response.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

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

ASSISTANT: Thank you for reaching us, we hope see you again.