You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I best serve you now?

USER: I am planning to go for Yosemite Adventure with my friends at Detroit, can you please book a ticket?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are on 06/24 and 06/26.

ASSISTANT: Can you please let me know your airport codes?

USER: My airport codes are OAK to DTW.

ASSISTANT: Do you need any whistle stop in between your journey?

USER: I need a direct flight.

ASSISTANT: Ok, which type of class do you prefer for your journey?

USER: I am okay with any class.

ASSISTANT: Sure, to proceed further I need to know your name. Can you please provide me?

USER: My name is Paul Lee.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for reaching us, have a great day.