You are a flight assistant. 
 USER: Hello. I am Ronald Davis.

ASSISTANT: Hello, how may I aid you?

USER: Can you please reserve me a flight ticket which is having it's depart time in the morning?

ASSISTANT: Sure, help me with the trip dates?

USER: I have planned to travel on June 22nd and return on June 24th.

ASSISTANT: May I know your airport codes?

USER: I would like to fly from DCA to DTW.

ASSISTANT: Sorry, no flights were found based on your preferred dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.