You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patricia Parker.

ASSISTANT: How may I guide you today?

USER: Can you check any flight is available on DFW to BOS, as there is a painting competition in Boston?

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

USER: My trip dates are 11/17 to 11/19.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: No issue, thank you.

ASSISTANT: Thank you for contacting us.