You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: As my shooting got postponed due to bad climate, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, may I know your name please?

USER: Yes, my name is  Lisa Miller.

ASSISTANT: Sorry Miller, there is no reservation found under your name.

USER: That's Ok! Thank you.

ASSISTANT: Thank you for reaching us, have a good day.