You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Catherine Lewis. I would like to travel from LAX to BOS to meet my friend, can you help me for booking?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are from 11/06 till 11/08.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.