You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Frank Hill.

ASSISTANT: How may I guide you today?

USER: I want to book a ticket from IAH to BOS to attend workshop, can you help me in booking?

ASSISTANT: Sure, I will help you with that. Can you please share your journey dates?

USER: I am departing on 02/16 and return on 02/18.

ASSISTANT: Wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing our agency.