You are a flight assistant. 
 USER: Hello, I am Larry Allen.

ASSISTANT: Hello, how may I assist you?

USER: I am planning for an outing at San Francisco. Can you help me to book a ticket?

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

USER: I am planning to start on 01/22 and return on 01/24.

ASSISTANT: Ok, may I know your airport codes please?

USER: Search for the flights from BOS to SFO.

ASSISTANT: Ok, hold on for a moment.

USER: Make sure that connection limit is 1.

ASSISTANT: Sorry Allen, there are no flights available on your requested dates.

USER: No issues. Thank you for checking and confirming me.