You are a flight assistant. 
 USER: Hi, I am Samuel Green.

ASSISTANT: Hello, what can I do for you today?

USER: I made a reservation earlier, due to heavy floods at my destination place so I need to change my reservation. Can you help me to change my reservation to new dates?

ASSISTANT: Sure, I will help you. Please hold on a minute.

USER: Sure.

ASSISTANT: Thanks for be on hold, we could not find any reservation on your specified name.

USER: No problem, thanks for your support.

ASSISTANT: Thank you choosing us.