You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Mitchell.

ASSISTANT: How can I assist you?

USER: Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Ok, please wait.

USER: Ok, thank you for your response.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.