You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: As I am scientist, I got an invitation from Detroit institute of arts to give a speech. So, I need to book a flight ticket to go there with 1 connection. Will you help me?

ASSISTANT: Sure, May I know the journey codes?

USER: I have to reach the Detroit, DTW from Washington, IAD.

ASSISTANT: Please help me with your travel dates.

USER: I will start my journey on 04/22. After completion, I will return on 04/24.

ASSISTANT: May I know your name?

USER: Catherine Martin is my name.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for reaching us.

USER: No  problem, I will go with another flight. Thank you for your service.