You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me with booking a flight ticket from DTW to IAD?

ASSISTANT: Sure. May I know your travel dates?

USER: My planned travel dates are from June 24 to June 26.

ASSISTANT: Do you have any class preference?

USER: No, I am comfortable to travel in both classes.

ASSISTANT: May I know your name?

USER: Sure, my name is Ronald Hall.

ASSISTANT: Do you have any other preferences?

USER: I need a direct flight in my journey.

ASSISTANT: Is there any time concern?

USER: No, thank's for asking.

ASSISTANT: Thank you for the information, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry, we did not find any flights for you.

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

ASSISTANT: Thank you for reaching us.