You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Elizabeth Johnson. I want to book a ticket from PHL to DEN, can you help me?

ASSISTANT: Sure, can you share your trip dates?

USER: My travel dates are 10/16 and 10/18.

ASSISTANT: Do you have any preferences?

USER: I want to return in the afternoon.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.