You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Andrew Lopez here, I want to reserve my ticket from JFK to DCA, can you please help me out?

ASSISTANT: Sure, let me know your specifications.

USER: Yes, I need a direct flight.

ASSISTANT: Can you please share your travelling dates?

USER: Sure, my preferable dates of journey are from Jul, 12 to Jul, 14.

ASSISTANT: Do you have any other requirements?

USER: Not required.

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

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Anyways, thank you for your service.