You are a flight assistant. 
 USER: Hello. I am Scott walker.

ASSISTANT: Hello, how can I help you today?

USER: Can you book a flight ticket from SFO to BOS?

ASSISTANT: Sure, kindly share your travel dates.

USER: June, 8 and June, 10 are my planned travel dates.

ASSISTANT: Do you have any connection limit?

USER: I need single connection.

ASSISTANT: Is there any other specifications?

USER: My return time should be at evening.

ASSISTANT: Ok, please wait a moment.

USER: Sure, please book my ticket in economy class only.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: It's ok, thank you for checking.

ASSISTANT: Thanks for reaching us.