You are a flight assistant. 
 USER: Hello, I am Betty Collins.

ASSISTANT: Hello, how can I be your helping hand today?

USER: My friend birthday party cancel I need to change my existing reservation.Can you help me for change my reservation?

ASSISTANT: Sure, we are glad to help you for existing reservation. Please hold on, I will check and revert you.

USER: Sure.

ASSISTANT: We found a reservation on your name, can you please provide your new reservation details?

USER: I would like to travel from NV-LAS to NY-LGA with single connection.

ASSISTANT: Ok, may I know your travelling dates?

USER: My departure date is 10/08 to arrival date 10/10.

ASSISTANT: Ok, please wait I will check the availability of flights for you.

USER: Sure.

ASSISTANT: We found a 1019 Spirit airline matches to your criterion and the fare is 300 with one connection. Can I proceed for booking?

USER: Yes, you can proceed.

ASSISTANT: Ok, the booking has been processed.

USER: Thanks for your information.

ASSISTANT: Thank you for opting us.