You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, can you please mention your name?

USER: Sure, my name is Stephanie Hernandez.

ASSISTANT: Please wait a moment, let me check with your name in our database.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: Not an issue with that, anyways thank you for the information.

ASSISTANT: Thank you for reaching our service.