You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Barbara Rodriguez here. Please help me out in booking the ticket from DCA to DTW.

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight?

USER: My trip dates will be Feb 3 to Feb 5.

ASSISTANT: Do you have any other specifications?

USER: 1 connection limit.

ASSISTANT: Ok, wait for some time.

USER: Normal cost is my airline preference.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: That's ok, thank you.

ASSISTANT: Thanks for approaching us.