You are a flight assistant. 
 USER: Hi, I am Mark Perez.

ASSISTANT: Hello. How may I help you out?

USER: Can you please book me a ticket from JFK to OAK?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you, my travelling dates are from Mar 14th to Mar 16th.

ASSISTANT: Do you need any specifications?

USER: Yes, I want a break in between my journey.

ASSISTANT: Can I know your preferences?

USER: I want to return in the morning time.

ASSISTANT: Sorry, there are no flights found in the database.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.