You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please book a flight ticket from PHL to SEA?

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

USER: Thank you. I have planned my travel dates as Dec 06 and Dec 08.

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

USER: I would prefer economy class to travel.

ASSISTANT: Let me know your connection limit.

USER: I am looking for single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I would like to return in afternoon time so please make sure that.

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

USER: Please reserve under my name Mary Wright.

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.

USER: Most welcome.