You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My plan to climb Camel back Mountain at Phoenix, AZ-PHX, can you help me to book a direct flight?

ASSISTANT: I will try to provide you a direct flight, if you please share some details. What are your scheduled dates to travel? to participate in climbing.

USER: I will depart on 02/14 and my return date would be on 02/16.

ASSISTANT: Ok. May I know, your boarding point?

USER: I need to start from Washington DC-DCA.

ASSISTANT: You have a Frontier airline. The connection limit is one. Are you willing to travel?

USER: No, make sure that I need a direct flight.

ASSISTANT: But no airline is there on respective dates with direct flight.

USER: Ok, thanks for your response.

ASSISTANT: Please share your name for documentation purpose.

USER: My name is Brain Moore.

ASSISTANT: Thanks for availing us, Have a nice day, Brain Moore.

USER: Thank you.