You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: I am Stephen Robinson here, I want to reserve my ticket from DCA to EWR, can you please help me?

ASSISTANT: Sure, will you share me your planned dates?

USER: Sure, my planned dates of journey are from Aug, 12 to Aug, 14.

ASSISTANT: Ok, do you need any connection in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: Yes, I need a business class.

ASSISTANT: Ok,Do you have any other specifications?

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

ASSISTANT: Sorry to inform, no flights found with you requiremens.

USER: Ok, not an issue. Anyways, thank you for your service.

ASSISTANT: Thank you.