You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I would like to visit Denver museum with my friend, please help me in booking a ticket from HOU to DEN.

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

USER: My planned travel dates are on Dec 21 and Dec 23.

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

USER: My name is Brandon Davis.

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

USER: Any class is comfortable for me.

ASSISTANT: Let me know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other requirements?

USER: No more requirements.

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: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing us.