You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, may I know your name please?

USER: I am Amy Robinson.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name.

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

ASSISTANT: Thank you for choosing us.