You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you today?

USER: My name is Anna Robinson. Please book a ticket from Boston, MA-BOS to Seattle, WA-SEA, for flower festival.

ASSISTANT: Sure, can you please provide your journey dates?

USER: Departure on 08/20 and return by 08/22.

ASSISTANT: Do you have any connection limit?

USER: Connections limit is 1.

ASSISTANT: Is there any price limit?

USER: Price limit is 200.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to inform you, we have not found any flight with your given details.

USER: Thanks.

ASSISTANT: Thanks for choosing us.