You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be of your service?

USER: I would like to change my reservation due to sudden change in my schedule. Please help me with it.

ASSISTANT: Ok, I can do that for you. Can you please let me know your name to check the reservation list?

USER: Reservation was done by the name Emma Davis.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We did not find any reservation on your name.

USER: Fine, thank you for your response.

ASSISTANT: Thank you for consulting us.