You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Nicholas Wilson. Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Ok, wait for a while.

USER: Ok, thank you for your response.

ASSISTANT: I found your reservation, shall I cancel it?

USER: Please cancel.

ASSISTANT: Ok, your reservation has been cancelled.

USER: Thank you for your service.

ASSISTANT: Thanks for reaching us.