You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Janet Martinez.

ASSISTANT: How can I help you?

USER: Can you help me for cancelling my existing reservation?

ASSISTANT: Sure, I'll help you in that. Please be on hold.

USER: Sure.

ASSISTANT: Janet, I have searched for your reservation in our database but I didn't find it to do cancellation.

USER: Oh! It's ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.