Hello
Hello, how can I help?
I need to find a flight, please, from NYC to Pittsburgh.
What  date would you like to leave?
The 13th, please.
Right, I found a First flight with United for 259 credits
 that takes 2 hours to get to Pittsburgh.
Hmm... that might work well, and it's priced pretty reasonably. I've been saving up for my upcoming wedding, you see.
The flight is available. Should I reserve it for you?
First, I want to check the weather in Pittsburgh.
For what day would you like the weather forecast?
Tuesday
It will be Sunny all day on Tuesday in Pittsburgh, with temperatures of around 3 degrees celsius.
Can I have the weather for Wednesday, too? I hope it will be warmer!
It will be Raining all day on Wednesday in Pittsburgh, with temperatures of around 25 degrees celsius.
Wow- that's a lot warmer! 
Is there anything else that I can do for you?
I'd like to book flight ID 134.
May I have your name, please?
Ben
Right, your flight is now reserved!
Thank you for your help! Goodbye.
Thank you and goodbye.