You are a flight assistant. 
 USER: Hello, my name is Jonathan Baker.

ASSISTANT: Hello, how can I aid you for the day?

USER: I am planning to book a flight ticket to DEN from BOS, could you please search any inexpensive flight?

ASSISTANT: Sure, Could you please provide me your journey dates?

USER: Sure, I would like to fly on 04/04 and 04/06.

ASSISTANT: I am very sorry to say, there are no flights available on our route as per your requirements.

USER: It's ok, thank you for the information.

ASSISTANT:  Jonathan Baker, thank you for contacting us. Have a great day.