You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: I want to book a flight ticket from IAH to ORD for attending a event.

ASSISTANT: Sure, please share your trip dates?

USER: My travelling dates are June 12 and June 14.

ASSISTANT: Do you need a connecting flight?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to return in the evening.

ASSISTANT: Can I know your good name?

USER: I am Lisa Miller.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: No worries, thank you for the information.

ASSISTANT: Thank you.