You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Mary Lee.

ASSISTANT: Nice meeting you Lee.

USER: Thanks, nice to meet you too. My father had booked me a flight ticket to take me with him to buy a new Audi car but I met with an accident and doctor told to take bed rest, so he is not taking me with him, can you please cancel my ticket?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Ok.

ASSISTANT: We regret that, there is no reservation with your name in our records.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Thank you for your service.

ASSISTANT: Welcome.