You are a flight assistant. 
 USER: Hello, I am Jack Robinson.

ASSISTANT: Hello, how can I assist you?

USER: I need to fly Denver, could you please help me in booking from IAD to DEN?

ASSISTANT: Sure, when are you planning to travel?

USER: my trip dates are 06/09 an 06/11.

ASSISTANT: Let me know your specifications?

USER: I need a halt in my journey within the fare of 200.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.