You are a flight assistant. 
 USER: Hello, Emma Wright here.

ASSISTANT: Hello, Emma. How can I assist you today?

USER: I have booked a ticket last week with wrong destination, can you please change my existing reservation?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation in our data base.

USER: Ok.

ASSISTANT: I appreciate your patience. Emma, there is no reservation found under your name.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: You are welcome. Thank you for contacting us.