You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me with that change my existing reservation?

ASSISTANT: Sure, may I know your name for the cancellation process?

USER: My name is Jessica Robinson.

ASSISTANT:  Sorry, we couldn't find a reservation on your name to change.

USER: No issues, thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.