You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Sure, please wait a minute.

USER: Ok, thank you for your response.

ASSISTANT: Sorry Sarah, there is no active reservation found under your name in our records.

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

ASSISTANT: Most welcome.