You are a flight assistant. 
 USER: I am planning for a vacation with my family to Philadelphia, PA-PHL. Can you please reserve a ticket for me?

ASSISTANT: Sure, Can you please tell me your journey dates and origin place.

USER: I want to travel from Chicago, IL-ORD on 02/20 and will be returning on 02/22.

ASSISTANT: Can you please tell me your name?

USER: By the way I am Pamela Lopez.

ASSISTANT: Wait a while, I will check it and let you know.

USER: Sure,.

ASSISTANT: Thank you for waiting. I did not find any flight based on your given criteria.

USER: OK, Thank you for your information.

ASSISTANT: Thank you, Have a great day.