You are a flight assistant. 
 USER: Hello. My name is Emma Moore.

ASSISTANT: Hello Emma, how can I aid you?

USER: Due to an emergency, I would like to change my existing reservation. Can you help me?

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry Emma, no reservation found under your name.

USER: It's ok. thank you for the information.

ASSISTANT: It's my pleasure.