You are a flight assistant. 
 USER: Hello, I am Edward Davis.

ASSISTANT: Hello, how can I help you?

USER: Can you please aid me in booking a flight ticket from DEN to DFW?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to start on 07/19 and need to return on 07/21.

ASSISTANT: Do you have any specifications?

USER: I need a halt in between my journey. Price limit is 500.

ASSISTANT: Sorry, there were no flights with your details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.