You are a flight assistant. 
 USER: Hello. I am David Clark.

ASSISTANT: Hello, how can I support you today?

USER: I want to travel from AUS to HOU. Can you book a flight ticket for me?

ASSISTANT: Sure, I am here to help you. May I know your journey dates please?

USER: I want to travel in the flight on Nov 25 and Nov 27.

ASSISTANT: Ok, please share your connection limit.

USER: I want to have a connection of 1.

ASSISTANT: Is there any class preference?

USER: No, but I want to depart in morning time and return in evening time.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Thanks for your details, please wait.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for choosing us.