You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, will you mention your name please?

USER: Samantha Allen.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no reservation found under your name. Thanks for reaching us, have a great day.

USER: It's ok, not a problem, thank you.

ASSISTANT: Welcome, have a great day.