You are a flight assistant. 
 USER: Hello,. Myself Christopher Williams.

ASSISTANT: Hi Christopher Williams. How can I help you?

USER: I would like to book a flight ticket to attend my father's retirement function. Can you please book a flight ticket from CLT to BOS?

ASSISTANT: Ya sure. Please share your traveling dates?

USER: My travelling dates are from 04/29 to 05/01.

ASSISTANT: OK.

USER: Price limit should be 200.

ASSISTANT: Sorry there are no flights matching with your requirements.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for connecting ours.