You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I support you today?

USER: I am Sarah Carter. I am planning to meet my uncle in Detroit, so please help me in booking a flight ticket from Washington.

ASSISTANT: Sure, we are mirthful to help you. Help me with the source and destination airport codes?

USER: My airport codes are DC - IAD, MI - DTW.

ASSISTANT: When you are willing to travel?

USER: I want to fly on 08/30 and return on 09/01.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight.

ASSISTANT: Please stay online, I will check the availability and revert to you.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.