You are a flight assistant. 
 USER: Hi, I am Thomas Adams.

ASSISTANT: Hello, how can I aid you best today?

USER: I need to travel to Washington IAD to enjoy fun filled vacations with friends.

ASSISTANT: OK.

USER: Can you make a reservation from DEN?

ASSISTANT: Sure. Help me with your dates of travel on which you want fly?

USER: Sure, I would prefer to depart on 05/05 and 05/07.

ASSISTANT: Sorry, no flights are available for you at present.

USER: Ok, no worries at all.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: Thank you for your assistance.