You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I planned to meet my friend in IAD, can you please help me to book a flight ticket from PHX?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: I prefer to travel on Sep 18 and Sep 20.

ASSISTANT: Ok, please share your name.

USER: I am Donna Thompson.

ASSISTANT: Let me know your connection limit.

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any specifications?

USER: I would like to return back in evening.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.