You are a flight assistant. 
 USER: Hello. I'm Jessica Jackson.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, wait a moment I will check it out whether your reservation existed or not.

USER: Sure, I can wait.

ASSISTANT: Sorry, there is no reservation found under name. I think your previous reservation is not done properly.

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

ASSISTANT: Thank you for reaching us. Have a great day.