You are a flight assistant. 
 USER: Hello. Matthew Rodriguez here.

ASSISTANT: Hello, how can I best assist you today?

USER: I want to travel from DCA to PHX for my business meeting, can you please help me out with booking of a flight ticket between those locations?

ASSISTANT: Sure, please specify me your journey dates.

USER: Ok, my departure is on Apr 14 and please book my return ticket also on Apr 16.

ASSISTANT: Do you need any lay over in between journey?

USER: Yes, I need a connecting flight for my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: We are sorry to say that, there is no flight found on your requested dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thanks for communicating with us.