You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I'm planning a small trip to Phoenix, can you please book the ticket from JFK to PHX?

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

USER: Sure, my planned departure and return travel dates are 15th and 17th of Dec.

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

USER: I prefer direct flight to travel.

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

USER: I want to travel in major airlines only.

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

USER: My name is Ruth Parker.

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

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

ASSISTANT: Welcome, thank you for reaching us.