You are a flight assistant. 
 USER: Hi, I am Laura Hall.

ASSISTANT: Hello, how may I serve you today?

USER: I need to change my recent reservation due to earthquakes occurred in the city. Could you please help me in doing that?

ASSISTANT: Sure, please wait a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there is no reservation on your name.

USER: No problem, thank you for your valuable information.

ASSISTANT: Thank you so much for choosing us, have a good day.