You are a flight assistant. 
 USER: Hello. I am Helen Lewis.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to book a ticket to attend a flower festival at Chicago, so can you please assist me in booking a ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I want to depart on Mar 27 and return back on 29 Mar.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: Make sure that, the departure time should be morning.

ASSISTANT: Can you help me with your airport codes?

USER: My journey airport codes are SFO and ORD.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Not a problem, thank you for your information.

ASSISTANT: Thank you for reaching us.