You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: Can you please help me to change my existing reservation?

ASSISTANT: Ok, may I know your name?

USER: My name is Benjamin Robinson.

ASSISTANT: I have found the reservation. May I know your travelling dates?

USER: I will travel on Oct 4th and 6th.

ASSISTANT: Ok, can I know your airport codes?

USER: I will travel from JFK to IAH.

ASSISTANT: Ok, do you have any other specifications?

USER: I am looking for normal-cost airline.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: I have found a flight with the United airlines are providing a flight having a connection limit 1. Can I proceed with the ticket booking?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is confirmed in an economy class and the flight number 1009 which depart at 4:00 Am and return at 5:00 AM.

USER: Thank you for your help in changing my reservation.

ASSISTANT: Thank you for reaching us. Have a happy journey.