You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am Justin Brown here, I want to reserve my ticket from DTW to DEN, can you please help me?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, my preferable dates of journey are from 07/26 to 07/28.

ASSISTANT: Do you need any break?

USER: No, for this journey the connections limit is not mandatory.

ASSISTANT: Please wait a while.

USER: Sure, I will wait.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: Ok, not an issue. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.