You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Susan Gonzalez.

ASSISTANT: How may I help you today?

USER: Due to health issues, I need to change my existing reservation. Please help me in that.

ASSISTANT: Please wait a moment, let me check with the details in our database.

USER: Sure.

ASSISTANT: I have found your details, can you please mention your new airport codes?

USER: Sure, My airport codes are NY - JFK and NV - LAS.

ASSISTANT: May I know your travelling dates, please?

USER: My flying dates are from 12/20 to 12/22.

ASSISTANT: Please hold a moment.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight with one connection and the price is 400 in Southwest airlines, can I proceed with the booking?

USER: Please go ahead.

ASSISTANT: Your ticket has been reserved with the flight number 1005.

USER: Thank you for your excellent service.

ASSISTANT: Thank you for reaching our service, have a safe flight.

USER: Most welcome.