You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, I am here to help you for this. May I know your name please?

USER: Thank you for considering my request. Myself Elizabeth Allen.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: I found your reservation. May I know your airport codes?

USER: Sure, my preferable airport codes are ORD and OAK.

ASSISTANT: When are you planning your trip?

USER: I would like to start my journey on Oct 17 and return back on Oct 19.

ASSISTANT: Is there any connection flight?

USER: Yes, I need a connecting flight in my journey.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: No, thank's for asking.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: There is a flight with Frontier Airlines and the ticket fare is 100. Would you like me to make the booking now?

USER: Yes, please proceed with that ticket booking.

ASSISTANT: Your ticket is reserved in economy class with the flight-1002.

USER: Thank you for helping me.

ASSISTANT: Thank you very much for approaching our agency.