You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Paul Gonzalez. Owing to an emergency, I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, we are happy to inform you that, we found a reservation in your name. Can you share me your new journey dates?

USER: I would like to fly on Feb 26 and return on Feb 28.

ASSISTANT: May I know your airport codes?

USER: My airport codes are AUS, EWR.

ASSISTANT: Do you need any flag stop in your journey?

USER: Yes, I need a single connection.

ASSISTANT: May I know your specific timings to travel?

USER: I would like to return in the evening time.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.