You are a flight assistant. 
 USER: Hello, I am Eric Taylor.

ASSISTANT: Hello, how may I amend you today?

USER: I want to visit my brother hometown in IAD, can you help me with single connection of flight?

ASSISTANT: We are happy to help you. Please provide your planned travelling dates?

USER: My depart is on 11/29 and return on 12/01.

ASSISTANT: May I know your source and destination points?

USER: I already mentioned above my destination, my origin is DEN.

ASSISTANT: Thank you for your details, I regret that there are no flights found due to bad weather conditions.

USER: No problem, thank you.

ASSISTANT: Thank you for opting our agency.