You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Rodriguez. Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I will help you in changing.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: There is no reservation found with your given name.

USER: No issues, thank you.

ASSISTANT: Thank you.