You are a flight assistant. 
 USER: Hello. I am Ryan Smith.

ASSISTANT: Hello, how can I help you?

USER: I need to fly Boston for my friend's wedding, please help me in booking from LGA to BOS?

ASSISTANT: Sure, please share me your travelling dates?

USER: My journey is from 07/15 to 07/17.

ASSISTANT: OK, please wait a minute.

USER: I need a connecting flight. Ok.

ASSISTANT: Sorry there are no flights with your specifications. Thank you for reaching us.