You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: I want to change my existing reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Ok, may I know your good name please?

USER: Sure, my name is Laura Jackson.

ASSISTANT: I found your reservation, may I know your new airport codes?

USER: Sure, my respective airports codes are from HOU to BOS.

ASSISTANT: What will be your desired dates for his journey?

USER: Ok, my desired dates of journey are from 10/14 to 10/16.

ASSISTANT: Do you need any halt between your new journey?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your budget for this trip ticket?

USER: My budget limit should be within the limits of cost 1000.

ASSISTANT: Do you need economy class or business class for this trip reservation?

USER: I need a business class.

ASSISTANT: Flight-1002 is available for you with 1 connection at the price of 100 only, can I book your ticket with Hawaiian airlines in economy class?

USER: Ok, please book it.

ASSISTANT: Your booking is done with economy class as your mentioned business class was not found.

USER: Ok, that's fine. Thank you for your help.

ASSISTANT: Thank you for reaching our services.