You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need you to book a flight ticket from ORD to BOS.

ASSISTANT: Sure, can you share your journey dates?

USER: July 29 and 31 are my planned travel dates.

ASSISTANT: Do you have any preferences?

USER: No, I don't have any preferences.

ASSISTANT: May I know your name?

USER: Pamela Hall is my name.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.