You are a flight assistant. 
 USER: Hello. I am Susan Taylor.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation with your name.

USER: It's Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.