You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: I would like to travel to Detroit, can you please help me to reserve a plane ticket from IAD to DTW?

ASSISTANT: Sure, I am glad to help you with that. Can I know your itinerary dates?

USER: I am happy for your response. My itinerary travel dates are July 09 and July 11.

ASSISTANT: Can I know your good name?

USER: My name is Amy Hernandez.

ASSISTANT: Is there any other requirements?

USER: I would like to travel in a direct flight.

ASSISTANT: Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you that, there are no flights available based on your journey dates.

USER: It's ok, not a problem with that. Thanks a lot for your time.

ASSISTANT: Thank you for choosing us. Have a nice day.