You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to book a ticket from ORD to LGA.

ASSISTANT: Sure, please help me with your travel dates.

USER: Departure is on Aug, 1 and return date is Aug, 3.

ASSISTANT: May I know your name?

USER: My name is James Williams.

ASSISTANT: Do you need any break in between your journey?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other preferences?

USER: I would like to return in the evening.

ASSISTANT: Thank you for the information, please wait for a while.

USER: Ok.

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

USER: Thank you.