You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you?

USER: I need you to do some modification in my existing reservation due to some health issue. Can you help me out?

ASSISTANT: Sure, I will help you with that. On what name do I need to check the reservation?

USER: Thank you. Stephanie Rodriguez is my name.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for your time. We are sorry to inform you that, there is no active reservation on your name to change it.

USER: Ok, no issue. Thank you for your time.

ASSISTANT: Thanks for spending your valuable time with us.