You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Is this Travel leaders agency?

ASSISTANT: Yes, you are at right place.

USER: I have booked a ticket from your agency last week to New York, due to heavy snowfall in New York, I want to change my existing reservation.

ASSISTANT: Ok, may I know your name to check for the previous reservation?

USER: I have booked my ticket on the name Angela Gonzalez.

ASSISTANT: Thank you for providing. Please allow me a moment while I check for the previous reservation.

USER: Sure.

ASSISTANT: Your patience is greatly appreciated. Angela, I see that that there is no reservation found under your name.

USER: It's ok, I will check for other alternative. Thanks for your assistance.

ASSISTANT: You are welcome. Thank you for contacting us.