You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight from DEN to LGA?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travel dates are Apr 30 to May 02.

ASSISTANT: Do you need any break in between journey?

USER: I prefer for direct flight.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT:  May I know your name for the documentation process?

USER: I am Robert Wilson.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you for checking.

ASSISTANT: Thank you for reaching us.