You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I serve you?

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, can you please help me with your name?

USER: I am Jack Rodriguez.

ASSISTANT: Thank you for your details. Sorry, we did not found any reservation on your name.

USER: Ok, thank you for your details.

ASSISTANT: Thank you for reaching us.