You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you please help me to book a ticket from OAK to DEN?

ASSISTANT: Sure, can you please share your journey dates?

USER: I want to travelling on May 06 and 08.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Can you please mention your connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your name please?

USER: My name is Jeffery Thomas.

ASSISTANT: Is there any more specifications in your journey?

USER: No.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available matching your specifications.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for approaching us.