You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jessica Hernandez.

ASSISTANT: Let me know, How can I be your helping hand today?

USER: As my plan to go for vacation has been postponed, Can you please change my reservation?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Jessica Hernandez, there is no active reservation on your name to change it.

USER: No problem. Thank you.

ASSISTANT: Thanks for approaching us.