You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Barbara Wilson. I want to meet my brother as he is unwell, can you please help me to book my flight ticket from DFW to IAD?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Do you prefer any halt in between your journey?

USER: Yes, I prefer for a single connection flight.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I want to depart on July 20 and also please book my return ticket on July 22.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Not an issue. Anyway, thank you.

ASSISTANT: Thank you for choosing us.