You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Susan Adams.

ASSISTANT: How may I render you?

USER: I want to cancel my ticket which was booked to Houston to visit Space Center, due to some security issue it has been closed. Could you please help me with this?

ASSISTANT: We are ecstatic to help you. Give me  a minute.

USER: Sure, take your own time.

ASSISTANT: Thanks for your time. We didn't found any reservation showing active in our database for updating your reservation.

USER: No worries, may be it was cancelled by someone. Anyway, thank you for your information.

ASSISTANT: Thank you for approaching us. Have a great day ahead.