You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a ticket with name Paul Miller.

ASSISTANT: OK. Can you let me know your travelling details?

USER: Ya sure. I want to travel from Chicago IL-ORD to Philadelphia PA-PHL.

ASSISTANT: OK,. Please give me a moment to check the flight that suits your needs.

USER: Ok.

ASSISTANT: Please provide me your planned dates?

USER: Ok. My depart is on 12/01 and returning on 10/03.

ASSISTANT: OK. Give me some time to check the availability of flights.

USER: Ok.

ASSISTANT: Thank you for being so patient. Sorry for inconvenience, no flights are found based on your requirements.

USER: Thank for your service.

ASSISTANT: Thank you for choosing us. Have a nice day.