You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in changing my reservation?

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

USER: I am Brian Lewis.

ASSISTANT: I found a reservation for you, can you please share your new travelling dates?

USER: My travel dates are from Jan 18 to Jan 20.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: I would like to travel from MCO to reach JFK.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.