You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Frank Lee here.

ASSISTANT: How may I serve you?

USER: I need your help in cancelling my recent reservation, as my planned program has been cancelled. Will you help me in that?

ASSISTANT: Sure, please wait for a moment. I will check your flight reservation status and let you know. Thanks for waiting. I  have found your flight reservation and cancelled it.

USER: Thank you so much for your help.

ASSISTANT: Thank you.