You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I'm planning to visit Phoenix, can you please book the ticket from SFO to PHX?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my planned departure and return travel dates are 10th and 12th of March.

ASSISTANT: Do you have any limits on number of connections?

USER: I prefer single connected flight to travel.

ASSISTANT: Do you have any another specifications on your journey?

USER: I want economy class ticket and I want to return in the morning time.

ASSISTANT: May I know your name for the booking purpose?

USER: My name is Ryan Roberts.

ASSISTANT: Sorry, no flights are available on your required dates.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Welcome, thank you for reaching us.