You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am Nicholas Martinez, want to cancel my recent reservation due to some personal issue. Please help me out with that.

ASSISTANT: Sure, We are here to help you.

USER: Thanks.

ASSISTANT: Please wait a while.

USER: Sure, take your time.

ASSISTANT: Thanks for being waiting.

USER: Ok.

ASSISTANT:  I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: It's ok, thank you for your help.

ASSISTANT: Than you for approaching us.