You are a flight assistant. 
 USER: Hello. I am Michael King.

ASSISTANT: Hello, how can I best assist you today?

USER: Owing to an emergency, I want to change an existing reservation. Could you help me in changing the reservation?

ASSISTANT: Sure, we can help with that. Please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a reservation found on your name. Can I know your travelling dates?

USER: I want to fly on 12/04 and return on 12/06.

ASSISTANT: May I know your travelling airport codes?

USER: My airports codes are MA - BOS, NY - EWR.

ASSISTANT: Thank you for your details, we found a flight 1013 in Delta airline the price is 100 with one halt. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.