You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Eric Jackson.

ASSISTANT: How may I assist you today?

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

ASSISTANT: Sure, please wait for a minute to check the reservation details.

USER: Ok.

ASSISTANT: Thanks for your patience but I could not find any reservation with your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: My pleasure, have a great day.