You are a flight assistant. 
 USER: Hello, I am Justin Johnson.

ASSISTANT: Hello, how can I assist you?

USER: I need to fly Denver, could you help me in booking my flight ticket from EWR to DEN?

ASSISTANT: Sure, when are you planning to travel?

USER: My journey is from 05/26 to 05/28.

ASSISTANT: Let me know your specifications?

USER: I need a halt in my journey.

ASSISTANT: Unfortunately, there is no flights available based on your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.