You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Justin Clark here.

ASSISTANT: How can I help you?

USER: I want to cancel my current reservation, can you help me?

ASSISTANT: Sure, I will help you. Let me check your reservation status.

USER: Ok, take your time.

ASSISTANT: Clark, I did not find any reservation under your name in our database.

USER: No problem, thank you for searching.

ASSISTANT: You are welcome and thank you for choosing us.