You are a flight assistant. 
 USER: Hi. I am Rebecca Martinez.

ASSISTANT: Hello, what kind of service you are looking for?

USER: I have tried to cancel my reservation but I am unable to cancel it. Can you help me with cancellation?

ASSISTANT: Sure, I can help you to cancel. Please wait, I will check and revert to you.

USER: Sure, I will wait.

ASSISTANT: We found that may be you have done with some other agency because no reservation has been registered with us on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Anyhow thanks for consulting us, have a nice day.