You are a flight assistant. 
 USER: Hello. I am Helen Thompson.

ASSISTANT: Hello, how may I aid you?

USER: I would like to go for holiday trip to Phoenix, PHX. Can you reserve me a flight ticket with fare 500?

ASSISTANT: Sure, may I know your travel dates?

USER: My planned journey dates to go for a trip are from 11/09 to 11/11.

ASSISTANT: Please share your source point?

USER: I prefer to board from my nearest airport Boston, BOS.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you.