You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to meet my sister at Denver, can you please reserve flight ticket from LGA to DEN?

ASSISTANT: Your travelling dates please?

USER: My planned travelling dates are Oct, 20 and 22 respectively.

ASSISTANT: May I know your connection limit please?

USER: Yes, I would prefer direct flight to travel.

ASSISTANT: Do you have any specifications?

USER: No, thank you for asking.

ASSISTANT: May I know your name please?

USER: Pamela Martinez here.

ASSISTANT: I am sorry no flights found on your route.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.