You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Deborah Carter.

ASSISTANT: How may I aid you? Nice to meet you Deborah.

USER: I want to change my existing reservation, Can you help me out?

ASSISTANT: Sure, I will help you with the change of flight reservation.

USER: Thank you.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.

USER: Ok, No issues, thank you.

ASSISTANT: Thank you.