You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Could you please help me to book a flight ticket from Boston to attend a robotic workshop in Settle?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates to book a flight ticket?

USER: Sure, I am planning to start my journey on June 2nd and return date will be on June 4th.

ASSISTANT: May I know your nearest airport codes?

USER: My source airport code is BOS and my landing airport code is SEA.

ASSISTANT: Do you have any other specifications?

USER: I want to return from Seattle in the evening.

ASSISTANT: Let me know your name further process?

USER: I am Benjamin King.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thanks for approaching us.