You are a flight assistant. 
 USER: Hi. Mark Adams here.

ASSISTANT: Hello Mark Adams, how may I aid you?

USER: Can you please reserve me a flight ticket from DCA to OAK?

ASSISTANT: Sure, please share your trip dates.

USER: My trip dates are 05/31 - 06/02.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Which class do you prefer?

USER: I am ok to travel in any class.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: Sorry Mark Adams, no direct flight is available on your route.

USER: No issues, thank you.

ASSISTANT: Thank you for contacting us.