You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I have to visit Phoenix, can you please book my flight ticket from BOS to PHX?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Thank you. I will depart on Feb 14th and return back on Feb 16th.

ASSISTANT: Are you fine with connecting flight?

USER: I prefer for a direct flight.

ASSISTANT: Let me know your name?

USER: My name is Brian Moore.

ASSISTANT: Sorry to say, no flight is available for you.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.