You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am John Martin. Please book me a ticket from ORD to MSP to meet my family.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I have planned to travel on 12/11 and 12/13.

ASSISTANT: Do you have any specifications?

USER: I need a halt.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, have a great day.