You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure.

USER: I am Nicole Baker.

ASSISTANT: Ok. Let me check with your recent reservation details.

USER: Ok.

ASSISTANT: Sorry, there is no reservation by your name.

USER: No issues, thank you.

ASSISTANT: Thank you.