Provide the theme summaries for the following conversation: 

Mr. Smiths: Good morning. We need one scientist, who's a natural sciences specialist, preferably an archeologist or a chemist.
Dalia: Good morning. I will think about it. I know one geologist.
Mr. Smiths: Geologist would be fine. Remember that this person has to entertain people with science.
Dalia: I am aware of that. I will contact him ASAP. I am going to ask around too. 
Mr. Smiths: Thank you. The conference will be held on 15th of April.
Mr. Smiths: I am creating a guests list. Are you willing to help on this one?
Dalia: Sure, when would I be needed?
Mr. Smiths:  You're already in the process of planning it. But if you wish, you can help with organization, on 14th and 15th.
Mr. Smiths: I'll send you the details if you're interested.
Dalia: Ok, I 'm in. It sounds exciting.
Mr. Smiths: I'm sure this will be a nice experience, for sure different than being at the office.
Dalia: Thank you for this opportunity. 
Mr. Smiths: No problem.
Mr. Smiths: Check your emailbox please.
Dalia: Okay, checking.

Summary: 
Dalia will help Mr. Smiths in organising a scientific conference that will be held on 15th of April.  