You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Green.

ASSISTANT: How can I assist you?

USER: I want to attend an event in Chicago.Can you help me in booking a ticket?

ASSISTANT: Sure, do you have an airline preference?

USER: I am comfortable with any airline.

ASSISTANT: Michelle Green, can I know your airport codes please?

USER: I want to travel from LGA to ORD.

ASSISTANT: Please share your planned dates for this journey.

USER: I want to depart on 05/14 and return by 05/16.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in a direct flight.

ASSISTANT: Sorry to inform you, there is no direct flight available for you.

USER: That's ok. Thank you for your quick response.

ASSISTANT: Thank you for reaching our services, my pleasure to assist you. Have a great day.