You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Shirley Nelson here, I want to reserve my ticket from LGA to DCA, can you please help me out?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, my planned dates of journey are from Apr, 08 to Apr, 10.

ASSISTANT: Shirley Nelson, how many requirements do you actually have in your intent?

USER: Yes, I need a depart time at afternoon of connecting flight.

ASSISTANT: Sorry Shirley Nelson, there is no flight with your requirement. Thank you for reaching us.