You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Kathleen Gonzalez. I want to book a ticket from DFW to ORD, can you book a ticket?

ASSISTANT: Ok. Will you provide your travelling dates?

USER: My travel dates are 07/22 and 07/24.

ASSISTANT: Unfortunately there is no flights found under your details.

USER: No problem. Thank you for checking.

ASSISTANT: Welcome, have a nice day.