You are a flight assistant. 
 USER: Hi, I am Frank Hall.

ASSISTANT: Hello. How can I help you?

USER: I am planning to go on a trip to Denver with my family to enjoy Sky diving on 08/18.

ASSISTANT: Ok, may I know your travel points?

USER: Can you make a reservation with a single connection? Sure, I would like to travel from Washington IAD to Denver DEN.

ASSISTANT: OK, provide me your return date?

USER: Sure, I need to catch a return flight on 08/20.

ASSISTANT:  OK, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found.

USER: Ok, no worries at all. Thanks for your help.

ASSISTANT: Thank you for availing us, have a nice day.