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

ASSISTANT: Hello, how may I help you?

USER: I am planning for a holiday trip at Detroit, can you please help me in reservation?

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

USER: My departure is on 04/03 and arrival is on 04/05.

ASSISTANT: May I know your airport codes?

USER: My source and destination are IAD and DTW.

ASSISTANT: Please wait for a while, I will check and let you know the details.

USER: Sure.

ASSISTANT: Sorry there were no flights matching with your preferred dates.

USER: Ok, no problem. Thank you for giving information.

ASSISTANT: Thank you for choosing us, have a great day.