You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you aid me to book my ticket from DEN to PHL?

ASSISTANT: Sure, could you share your trip dates?

USER: My travel dates are Oct 4 and Oct 6 respectively.

ASSISTANT: Do you have any requirements?

USER: Make sure that connecting limit is single.

ASSISTANT: May I know your name?

USER: Andrew Brown here.

ASSISTANT: There is Jetblue airline, flight number 1027 with the fare of 200.

USER: I prefer to travel in Business class.

ASSISTANT: Ok, wait a minute. Let me check.

USER: Ok.

ASSISTANT: Sorry, we could not find any flights as on your request.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.