You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER:  As I am a scientist, I want to attend science festival with my students at Detroit. Can you do the reservation?

ASSISTANT: Sure, airport codes please?

USER: My airport codes are SEA-DTW.

ASSISTANT: When did you planned to travel?

USER: Dates are 04/27 and 04/29.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: May I know your name please?

USER: Ronald Hill here.

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

USER: No problem, I will check with another airline.

ASSISTANT: Thanks for reaching us.

USER: Thank you.