You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Clark.

ASSISTANT: How can I guide you at this moment?

USER: I need to cancel my reservation, can you help me out please?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Jennifer Clark, there is no active reservation found under your name in our database.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for utilising our service.