You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: My name is Daniel King.

ASSISTANT: Hello Daniel.

USER: Can you help me in changing my reservation?

ASSISTANT: Sure Daniel, please wait a while.

USER: Sure, take your time.

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

USER: That's ok. Thank you for your time.

ASSISTANT: You are most welcome.