You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Could you please book a flight ticket from HOU to PHX?

ASSISTANT: Sure, Can you please help me with your depart and arrival dates?

USER: My travel dates are Feb 21 and Feb 23.

ASSISTANT: Ok, Let me know your connection limit.

USER: I need a direct flight.

ASSISTANT: Ok, May I know your name?

USER: My name is Frank Allen.

ASSISTANT: Ok, Is there any other specifications?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there were no flights running to that location due to abnormal weather conditions.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.