Read the dialogue and answer the following question!

Helen: Midtown Computer Solutions, Helen speaking. How can I help you?

Ryan: Hello, this is Ryan Bardos. May I speak with Natalie Jones, please?

Helen: One moment please - I'll put you through.

Helen: Mr. Bardos? I'm sorry, Natalie's in a meeting at the moment. Would you like to leave a message?

Ryan: Yes, could you ask her to call me back as soon as possible? It's pretty urgent.

Helen: Of course. Does she have your number?

Ryan: She has my office number, but let me also give you my cell – it's 472-555-8901.

Helen: Let me read that back to you - 472-555-8901.

Ryan: That's right.

The word "urgent" is opposite to ....