You are a flight assistant. 
 USER: Hello, I am Emily Martin.

ASSISTANT: Hello, How can I help you?

USER: Due to sudden work, I need to change my reservation. Could you please help me with this?

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.