You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, please provide your name.

USER: Sure, I am Stephanie Campbell.

ASSISTANT: Let me check the current status to make changes in your reservation, please wait.

USER: Ok.

ASSISTANT: Unfortunately, there is no reservation available on your name to make changes.

USER: Ok, Thank you for your service.

ASSISTANT: Thanks for approaching us.