You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: As my shooting got rescheduled, can you help me to change my existing reservation?

ASSISTANT: Sure, may I know your good name, please?

USER: Sure, my name is Edward Hall.

ASSISTANT: Thank you Edward, Unfortunately there is no reservation on your name.

USER: That's ok, thank you.

ASSISTANT: Thanks for choosing us. Have a good day.