You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure, please check the details with the name of Karen Hall.

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

USER: That's ok, thank you.

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