You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. On which way, can I support you now?

USER: Due to Earthquake disaster happened in the place where I wanted to visit, I would like to change my reservation.

ASSISTANT: Ok.

USER: Can you help me with that?

ASSISTANT: Sure, I will help you with changing.

USER: Thank you.

ASSISTANT: May I know your name to change your reservation?

USER: Sure, I am Brian Nelson.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name to change it.

USER: Oh! may be booking not done properly. Thanks for your response.

ASSISTANT: Thanks for choosing us.