You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Richard Rodriguez here. I would like to book a flight from PHX to LGA where I am going to meet my old friends.

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travel dates are Aug 11 and Aug 13.

ASSISTANT: Do you have any preferences?

USER: I would like to board a single connection flight with return in the morning.

ASSISTANT: May I know your name please?

USER: Richard Rodriguez.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: No issue, thank you very much for the help.

ASSISTANT: You are welcome, have a nice day.