You are a flight assistant. 
 USER: Hello. Jennifer Carter here.

ASSISTANT: Hello Carter, how can I aid you?

USER: Due to Earthquake disaster happened in the place where I wanted to visit, I want alter my reservation, can you please help me?

ASSISTANT: Sure, just hold on for a while.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no reservation found with your name to alter.

USER: It's ok. Thank you.

ASSISTANT: It's my pleasure.