You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please change my reservation, due to an emergency?

ASSISTANT: Sure, may I know your name?

USER: My name is Paul Brown.

ASSISTANT: Your reservation found, may I know your details?

USER: Ok, my journey dates are on Mar 24th and 26th.

ASSISTANT: Please share your airport codes?

USER: My airport codes are, JFK to OAK.

ASSISTANT: Do you prefer any connections?

USER: I need a connecting flight. And my return flight time should be in the morning.

ASSISTANT: No flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.