You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Deborah Hill. Please book me a ticket from HOU to DTW to meet my family.

ASSISTANT: Let me know your travelling dates?

USER: I have planned to travel on 12/25 and 12/27.

ASSISTANT: Do you have any specifications?

USER: I need a halt in between my journey.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thanks.

USER: Thank you.