You are a flight assistant. 
 USER: Hello. My name is Sandra Gonzalez.

ASSISTANT: Hello. How may I guide you?

USER: I want to change my existing reservation, due to some issue.

ASSISTANT: Sure, hold on for a moment.

USER: Ok.

ASSISTANT: Can I know the details of travel?

USER: My airport codes are LAX and PHL.

ASSISTANT: Can I know the dates?

USER: My journey dates are 08/20 and 08/22.

ASSISTANT: Frontier airlines flight 1019 matches with your preferences, can I proceed?

USER: My connection limit should be 1.

ASSISTANT: Sure, Your ticket is booked.

USER: Thank you for booking.

ASSISTANT: Thank you, have a safe flight.