You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I aid you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please share your good name please?

USER: Sure, my name is Stephen Hernandez.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, we found a reservation your name. Can you please forward your travelling dates?

USER: Sure, my dates of journey are from 03/16 to 03/18.

ASSISTANT: Help me with your airport codes?

USER: Ok, my airports codes are from ORD to IAD.

ASSISTANT: We found a connecting flight 1029 in Hawaiian airline with fare 300 in economy class. Shall I proceed with booking?

USER: Ok, please book it.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you.