You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I want to change dates in my existing reservation, can you please help me?

ASSISTANT: Sure, please provide your name.

USER: Myself Nancy Clark.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any reservation on your name to change it.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for contacting us.