You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to change my flight reservation as I am unwell, please help me.

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Can you please share me your name?

USER: My name is Amanda Thomas.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.