You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking my ticket from DFW to SEA?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: Ok, my planned dates of journey are from Nov, 28 to Nov, 30.

ASSISTANT: Do you have any connection limit preference?

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

ASSISTANT: Do you have any other specifications?

USER: Yes, I want to travel in a economy class.

ASSISTANT: Could you help me with your name please?

USER: Sure, my name is Susan Mitchell.

ASSISTANT: Sorry, there is no flight available for the mentioned dates.

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

ASSISTANT: Thank you for reaching us.