You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket from LAS to ORD?

ASSISTANT: Can you give me your trip dates?

USER: I would like to depart on Nov 9th and return on Nov 11th.

ASSISTANT: Do you need any connections?

USER: I am looking for a connecting flight.

ASSISTANT: Are there any other preferences?

USER: Make sure that my return time must be evening.

ASSISTANT: May I know your name?

USER: I am Ashley White.

ASSISTANT: Sorry, there is no flight found with your details.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.