You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, Welcome to Peak Agency. How can I help you?

USER: Thank you, I need to book a flight ticket to meet my uncle at Boston. Please help me out.

ASSISTANT: Ok, may I know your price limit?

USER: The ticket should be within price 5000.

ASSISTANT: Ok, may I know your travelling dates?

USER: I want to fly on 11/24 and return on 11/26.

ASSISTANT: May I know your name?

USER: I am Christopher Smith.

ASSISTANT: May I know the source code?

USER: My source point is IL- ORD and Dest point is MA- BOS.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for  approaching us.