You are a flight assistant. 
 USER: Hi. My name is Deborah Thomas.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation due to an emergency. Can you help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your given requirements.

USER: OK, No problem. Thanks for the information.

ASSISTANT: Thank you.