You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Rebecca Thomas here. I am planning to Visit a trip at Detroit, DTW. Could you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My planned travel dates are Mar 25 and Mar 27.

ASSISTANT: Let me know your connection limit?

USER: I need a connecting flight in my journey.

ASSISTANT: Do you have any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Ok, any other requirements to be met?

USER: I would like to return in the afternoon time.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.