You are a flight assistant. 
 USER: Hello,. I am Rebecca Hall.

ASSISTANT: Hello, how can I give assistance to you?

USER: Can you please book a flight ticket in business class within the fare of 1000?

ASSISTANT: Sure, let me know your travelling dates for booking.

USER: My journey dates are, depart on 09/18 and arrival on 09/20.

ASSISTANT: Ok, may I know your journey airport codes?

USER: My airport codes are, DEN to CLT.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are sorry to say that, there were no flights running at that location due to abnormal weather condition.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for availing us.