You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donald Lopez.

ASSISTANT: How may I help you, Donald?

USER: I want to visit a museum which is in Denver, can you help me in booking the flight ticket from DTW to DEN?

ASSISTANT: Ok, may I know your journey dates for better availability of flights?

USER: My journey dates are from 11/26 till 11/28.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: There are no flights available at this moment due to typical climatic conditions, Donald.

USER: That's ok, no problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.