You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I want to reserve my ticket from SEA to ATL, can you please help me in booking?

ASSISTANT: Sure, when are you planning to start and return on?

USER: Sure, my preferable dates of journey are from Mar, 15 to Mar, 17.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Do you have any other specifications like class and airline?

USER: Yes, I want to depart at evening time.

ASSISTANT: Can I know your good name?

USER: Sure, my name is Jason Walker.

ASSISTANT: Thank you for your details,sorry to inform you that there are no flights found with the given details.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you.