You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Miller here.

ASSISTANT: How can I assist you?

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 this.

USER: Thank you.

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

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

ASSISTANT: Thank you for contacting us.

USER: Thank you for the information.