You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Could you please help me to book a flight ticket from DEN to SEA as I want to attend a storytelling festival?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Joseph Scott.

ASSISTANT: When do you want to travel?

USER: I want to travel on Mar 19 and return on Mar 21.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Are there any more specifications?

USER: No.

ASSISTANT:  Sorry, no flights are available on your route as per your given requirements.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.