You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I render you today?

USER: I am Sarah Smith.

ASSISTANT: Ok.

USER: Can you please assist me in flight ticket booking?

ASSISTANT:  Sure, we are perky to help you. Can you please provide your take off and landing airport codes?

USER: Thank you and my source location airport code is DEN and my destination code is AUS.

ASSISTANT: Let me know your connection limit.

USER: I am looking for direct flight.

ASSISTANT:  In which class would you like me to book your flight ticket?

USER: I am ok with economy class preferably.

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

USER: I have planned to travel on dates of Apr 03 and Apr 05.

ASSISTANT: Do you have any other requirements?

USER: Yes, I would like to depart in afternoon time.

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

USER: Sure, take your time.

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

USER: Oh! It is sad to hear, Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.