You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: I need to change my reservation due to urgent meeting, can you help me with that?

ASSISTANT: Sure, may I know your good name?

USER: I am Joseph Scott.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: There is no reservation found on your name in our airline database.

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

ASSISTANT: Thank you for choosing us.