You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am planning to go to Chicago with my friends to celebrate my birthday. Can you help me to book a ticket?

ASSISTANT: Sure, please provide me your planned trip dates?

USER: My journey dates are 06/11 and 06/13.

ASSISTANT: Help me with the airport codes?

USER: My airport codes are HOU-ORD.

ASSISTANT: May I know your good name please?

USER: Brenda Thomas here.

ASSISTANT: Thank you for your details. We are regret to say that, no flights were found to your desired routes.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.