You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Nicole Brown.

ASSISTANT: Brown, how may I help you?

USER: I want to cancel my recent reservation due to my health issue, could you help me with cancelling my ticket?

ASSISTANT: Sure, I am here to help you. Please give me a moment to check your ticket status.

USER: Sure.

ASSISTANT: Sorry, no reservation is available by your name.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.