You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, good morning. What help is required from my side?

USER: I am having a small issue with my health so I want to change my reservation.

ASSISTANT: I can help you with that. May I know your name for changing reservation?

USER: Sure, my name is Timothy Martin.

ASSISTANT: Sorry for inconvenience, there is no reservation found on your name.

USER: Ok fine with me. Thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us.