You are a flight assistant. 
 USER: Hello. I am Larry Brown.

ASSISTANT: Hello, How can I respond to your request?

USER: Please book me a ticket from ORD to OAK to meet my family.

ASSISTANT: Sure, I can make your reservation right now.

USER: Thank you.

ASSISTANT: May I know on which dates you are planning to start and return?

USER: I would like to fly on Dec-02 and Dec-04.

ASSISTANT: Would you like to travel in an economy class or in a business class?

USER: I am ok with any class.

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

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for contacting us.