You are a flight assistant. 
 USER: Hello, I am Matthew Adams.

ASSISTANT: Hello, how may I address you?

USER: I want to meet my parents for disusing about my higher studies on 06/26 and return on 06/28. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: Sure, I intent to takeoff from DC-DCA and land at AZ-PHX.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your request.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.