You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Amy Hernandez. Due to earthquake disaster happened in the place where I wanted to visit.So I want to alter my reservation. Could you please help me with changing my reservation?

ASSISTANT: Sure, please give me a minute.

USER: Ok.

ASSISTANT: There is no reservation active with your name in our database.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thanks for choosing us.