You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I support you today?

USER: I want to book a flight ticket to attend my Colleague's Ring Ceremony. Can you please book a flight ticket with a connecting flight?

ASSISTANT: Sure, please share your travelling dates?

USER: My trip dates are 04/27 - 04/29.

ASSISTANT: Help me with your source and destination airport codes?

USER: I will start from MA - BOS and reach to TX - DFW.

ASSISTANT: May I your good name please?

USER: I am Larry White.

ASSISTANT: Sorry, no flights found on this routes.

USER: Not a problem. Thanks for your information.

ASSISTANT: Thanks for availing us, have a nice day.