You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Frank Walker here.

ASSISTANT: How may I guide you today?

USER: Can you please check my previous booking and help me with cancellation?

ASSISTANT: Sure, I will help you with that.

USER: Ok, I will be waiting for your response.

ASSISTANT: We regret to notify that, there is no reservation found on your name in our records.

USER: Oh! That's ok. Thank you for checking.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Most welcome.