You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am heading to BOS from SEA to participate in NBA tournament. Can you book me a ticket?

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

USER: I would start on Oct 28 and return on Oct 30.

ASSISTANT: Do you have any limits on number of connections?

USER: Yes, 1 stop over is required.

ASSISTANT: May I know your name?

USER: I am Linda Thomas.

ASSISTANT: Do you have any another specifications on your journey?

USER: I need to depart in the evening.

ASSISTANT: Unfortunately no flights are available on your specified  dates.

USER: That's alright, thanks for your assistance.

ASSISTANT: Welcome, thank you for reaching us.