You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Lisa Lopez here.

ASSISTANT: How may I aid you today?

USER: Owing to an emergency I have request you to cancel my reservation, can you please help me out with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: Oh! I think the ticket was not booked properly while I am booking. Thank you for the information.

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

USER: Welcome.