You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I have made some changes in my trip, can you please help me to change my reservation accordingly?

ASSISTANT: Ok, may I know your name to check with your previous booking?

USER: My name is Jerry Williams.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: There is no reservation found by your name.

USER: No worries, thank you for your time in checking it.

ASSISTANT: Thank you for choosing our services regarding your help.