You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned dates of journey are from Jul, 28 to Jul, 30.

ASSISTANT: Can you please share your connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your depart time and return time?

USER: Yes, I need a depart time at morning and return time at afternoon.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a business class.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for opting us.