You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Chicago, can you please book me a ticket from LGA to ORD?

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

USER: My preferable journey dates are Jan 25 and Jan 27.

ASSISTANT: Ok, can you please help me with your name?

USER: My name is Steven Brown.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, do you have any other requirements?

USER: I prefer to return in morning flight.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: You are welcome and thank you for choosing us.