You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you at this moment?

USER: I need to change my existing reservation due to some emergency work. Can you please help me out?

ASSISTANT: Sure, I will help you with that. May I know your name for checking your previous reservation status?

USER: Ok, my name is Ashley Walker.

ASSISTANT: Ok, please hold on a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: I have found your reservation. Could you please mention your preferable airport code names?

USER: I will leave from LGA to reach DCA.

ASSISTANT: Can you please mention your preferable travel dates?

USER: My planned journey dates are June 17 and June 19.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: No, I am flexible to travel at any time.

ASSISTANT: Are you ok with connecting flight or you need a direct flight?

USER: I am looking for a flight having single connection.

ASSISTANT: Is there any additional preferences do you have?

USER: I prefer a normal class airline.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: United Airlines flight available with connection limit 1 and fare is 200, shall I confirm this economy class flight?

USER: Yes, you can.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1011.

USER: Thank you for assisting me.

ASSISTANT: You are welcome Ashley Walker.