You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: I need to reserve my ticket from LAX to ORD, can you please help me?

ASSISTANT: Sure, when you are planning to make your journey?

USER: Ok, my travelling dates are from Sep, 13 to 15.

ASSISTANT: Is there any class preference?

USER: Yes, I should be prefer economy class due to my budget issue.

ASSISTANT: May I know your name please?

USER: Sure, my name is Jerry Lewis here.

ASSISTANT: Do you have any other preferences?

USER: Yes, I need a direct flight to travel.

ASSISTANT: Sorry we did not find any flights matching your journey dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing our services. Have a good day.