You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book me a flight ticket from IAD to LAS?

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

USER: I want to start my journey on Oct 27th and return on Oct 29th.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: I am Robert Harris.

ASSISTANT: Let me know your connection limit?

USER: I want a single connection in between my journey.

ASSISTANT: Do you have any other requirements?

USER: Yes, I want to return in the evening.

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

USER: No issues, thank you for your information.

ASSISTANT: Thank you for choosing us.