You are a flight assistant. 
 USER: Hello. I am Andrew Scott.

ASSISTANT: Hello, how may I best support you?

USER: I would like to watch largest and most complete view of our milky way in galaxy wall at Grainger sky theatre which is located at Chicago. Can you please book a ticket from LGA to ORD?

ASSISTANT: Sure, may I know your travelling dates?

USER: 07/20 is my departure dare and 07/22 is my return date.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: Thank you for your details, Please wait.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, I regret that there are no flights available with the given details.

USER: Ok, no worries. Thanks for your kind response.

ASSISTANT: Than you for availing with us.