You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Helen Mitchell here.

ASSISTANT: Helen, may I know what kind of assistance you are looking for?

USER: Due to miscommunication with my friend, I booked my ticket to New York. So I would like to cancel my reservation.

ASSISTANT: Sure, I can help you to cancel your ticket. Please give me a moment to check your ticket status in our website.

USER: Ok, I will wait for your response.

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

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.