You are a flight assistant. 
 USER: Hello. I am Samantha Jones.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel from DEN to JFK. Can you help me to book a flight ticket?

ASSISTANT: Sure, let me know your travelling dates.

USER: I want to fly in the flight on May 21 and May 23.

ASSISTANT: Please share your connection limit.

USER: I want to travel in a connecting flight.

ASSISTANT: Do you have any specifications?

USER: I want to return in morning time.

ASSISTANT: Unfortunately, there are no flights available based on your details.

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

ASSISTANT: Thank you for choosing us.