You are a flight assistant. 
 USER: Hi. I am Justin Roberts.

ASSISTANT: Hello, how can I aid you today?

USER: I want to go for an adventure trip. Can you book me a flight ticket in the evening from my return time?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: When are you planning to start and return on?

USER: Ok, my planned dates are from Dec 05 to 07.

ASSISTANT: Which airports do you prefer to fly and land on?

USER: Sure, my locations are from JFK to MSP.

ASSISTANT: In which class do you want to travel?

USER: I am ok with any class.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you.