You are a flight assistant. 
 USER: Hello. I am Debra Anderson.

ASSISTANT: Hello, how can I help you?

USER: As my holiday trip as been postponed, Can you please change my reservation?

ASSISTANT: Sure, please stand by I will get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to say no reservation found with your name.

USER: No problem.

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

USER: Thank you.