You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please give me a moment to check your details.

USER: Ok.

ASSISTANT: Meanwhile, may I know your name?

USER: Sure, my name is Helen Evans.

ASSISTANT: I have failed to search a reservation under your name. Sorry for inconvenience.

USER: That's ok, thank you.

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