You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I want to change my existing reservation due to some issues. Can you please aid me to change it?

ASSISTANT: Sure, I can help you in changing the ticket. May I know your name please?

USER: Thank you. Sure, please check my reservation on the name of Ryan Mitchell.

ASSISTANT: Happy to inform you that I have found your reservation, can I know your travelling dates please?

USER: Sure, My travelling dates are on Sept 25 and 27.

ASSISTANT: Can I know your airport codes too?

USER: Sure, I am heading from EWR to reach MSP.

ASSISTANT: Do you need any specifications?

USER: I need a direct flight in normal cost airline.

ASSISTANT: Can I know your preferences?

USER: I don't have any preferences.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, no issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.