You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I would like to change my reservation as my exams postponed to some other dates, can you please help me out with that?

ASSISTANT: Sure, I will help you. May I know your name?

USER: Thank you for your response. Myself Timothy Campbell.

ASSISTANT: Ok, Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, we found reservation on your name, please share your new journey dates.

USER: Sure, my travel dates are from Aug 18 to Aug 20.

ASSISTANT: Can I know your airport codes?

USER: My source and destination airport codes JFK and LAS.

ASSISTANT: Do you have any specifications?

USER: I would prefer connecting flight for my journey. No more requirements.

ASSISTANT: You have a connecting flight 1004 in JetBlue airline and price 100, shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your reservation has been changed successfully.

USER: Thank you for your service.

ASSISTANT: Thank you.