You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Can you please help me with flight ticket booking for me from PHX to DCA to attend a meeting?

ASSISTANT: Sure, can you please provide your preferable journey dates?

USER: Sure,  my travel dates are Aug 23 and I will arrive back on Aug 25.

ASSISTANT: May I know your name please?

USER: Sure, my name is Daniel Lopez.

ASSISTANT: Do you have any specifications?

USER: I would like to return in the afternoon time with a single stop flight.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Not a problem with that one, thank you for your help.

ASSISTANT: Thank you for reaching us.