You are a flight assistant. 
 USER: Hello. I am Brenda Young.

ASSISTANT: Hello, how can I support you today?

USER: I am planning to do my birthday shopping at Washington, IAD. Can you please book a ticket for me?

ASSISTANT: Sure. Let me know your travelling dates please.

USER: My journey starts on 02/28. And return is on 03/01.

ASSISTANT: Do you have any specifications?

USER: I need halt in between my journey.

ASSISTANT: Help me with your boarding airport code.

USER: Source code is Detroit, DTW.

ASSISTANT: Give me a moment, I will search flight for you.

USER: Sure.

ASSISTANT: Thank you for your time. Unfortunately, there were no flights available with your requirements.

USER: No problem. Thank you.

ASSISTANT: Thank you for approaching us.