You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Stephanie Martinez here.

ASSISTANT: How may I assist you?

USER: I want to cancel my previous booking. Can you help me?

ASSISTANT: Sure, I am here to help you out.

USER: Ok, I will be waiting for your response.

ASSISTANT: Stephanie Martinez, we haven't found any reservation under your name in our database.

USER: Oh! That's very sad to know. Anyways, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: Most welcome.