You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you book a flight ticket from ORD to LAX?

ASSISTANT: Sure, let me know your travel dates.

USER: My trip is in Oct from 5th to 7th.

ASSISTANT: May I know your name?

USER: Nicholas Wilson here.

ASSISTANT: Do you have any limits on number of connections?

USER: I want a single connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No, thanks for asking.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, I did not find any flights for you.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for reaching us.