You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Susan Evans. I want to change an existing reservation, due to my interview got postponed. Could you help me in changing a reservation?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: Not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.