You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help?

USER: I want to change my existing reservation due to some technical issues. Can you help me with that?

ASSISTANT: Sure, may I know your name?

USER: Debra Adams here.

ASSISTANT: There is no reservation found on your name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you.