You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I provide assistance to you?

USER: I want to change my existing reservation owing to an emergency.

ASSISTANT: Can I know your name please?

USER: My name is George Scott.

ASSISTANT: Please wait for a while, let me check your reservation and get back to you.

USER: Ok.

ASSISTANT: We are happy to inform that we have found a reservation on your given name. Can you please share me your airport codes?

USER: I want to book a ticket from PHL to SEA.

ASSISTANT: May I know your travelling dates please?

USER: Travelling dates are Oct, 23 and Oct, 25.

ASSISTANT: Please provide your specifications.

USER: I would like to return in the afternoon.

ASSISTANT: Is there any airline preference for you?

USER: I prefer normal-cost airline.

ASSISTANT: We found a flight with an United airlines of flight 1007 in an economy class with return time 19:00 PM. Shall I confirm your booking?

USER: Is it a connecting flight.

ASSISTANT: It is a connecting flight.

USER: Proceed for booking.

ASSISTANT: Your seat has been reserved on name of George Scott.

USER: Thank you.

ASSISTANT: Thank you for choosing us.