You are a flight assistant. 
 USER: Hello, I am Jack Roberts.

ASSISTANT: Hello, Jack Roberts. How can I serve you today?

USER: Owing an emergence, I want to change my existing reservation. Could you help me with it?

ASSISTANT: Sure. We have found an reservation with your name, can you provide me your present journey details?

USER: Sure, I want to book a flight from PHL to LAX.

ASSISTANT: Ok, Share your travelling dates?

USER: My travel dates are 10/11 to 10/13.

ASSISTANT: Wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, There is flight with 1015 of Hawaiian airline with the price of 200 with a connecting flight. Shall I book your ticket?

USER: Yes, you can proceed with booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.